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createplan.c
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1/*-------------------------------------------------------------------------
2 *
3 * createplan.c
4 * Routines to create the desired plan for processing a query.
5 * Planning is complete, we just need to convert the selected
6 * Path into a Plan.
7 *
8 * Portions Copyright (c) 1996-2026, PostgreSQL Global Development Group
9 * Portions Copyright (c) 1994, Regents of the University of California
10 *
11 *
12 * IDENTIFICATION
13 * src/backend/optimizer/plan/createplan.c
14 *
15 *-------------------------------------------------------------------------
16 */
17#include "postgres.h"
18
19#include "access/sysattr.h"
20#include "access/transam.h"
21#include "catalog/pg_class.h"
22#include "foreign/fdwapi.h"
23#include "miscadmin.h"
24#include "nodes/extensible.h"
25#include "nodes/makefuncs.h"
26#include "nodes/nodeFuncs.h"
27#include "optimizer/clauses.h"
28#include "optimizer/cost.h"
29#include "optimizer/optimizer.h"
30#include "optimizer/paramassign.h"
31#include "optimizer/pathnode.h"
32#include "optimizer/paths.h"
33#include "optimizer/placeholder.h"
34#include "optimizer/plancat.h"
35#include "optimizer/planmain.h"
36#include "optimizer/prep.h"
37#include "optimizer/restrictinfo.h"
38#include "optimizer/subselect.h"
39#include "optimizer/tlist.h"
40#include "parser/parse_clause.h"
41#include "parser/parsetree.h"
42#include "partitioning/partprune.h"
43#include "tcop/tcopprot.h"
44#include "utils/lsyscache.h"
45
46
47/*
48 * Flag bits that can appear in the flags argument of create_plan_recurse().
49 * These can be OR-ed together.
50 *
51 * CP_EXACT_TLIST specifies that the generated plan node must return exactly
52 * the tlist specified by the path's pathtarget (this overrides both
53 * CP_SMALL_TLIST and CP_LABEL_TLIST, if those are set). Otherwise, the
54 * plan node is allowed to return just the Vars and PlaceHolderVars needed
55 * to evaluate the pathtarget.
56 *
57 * CP_SMALL_TLIST specifies that a narrower tlist is preferred. This is
58 * passed down by parent nodes such as Sort and Hash, which will have to
59 * store the returned tuples.
60 *
61 * CP_LABEL_TLIST specifies that the plan node must return columns matching
62 * any sortgrouprefs specified in its pathtarget, with appropriate
63 * ressortgroupref labels. This is passed down by parent nodes such as Sort
64 * and Group, which need these values to be available in their inputs.
65 *
66 * CP_IGNORE_TLIST specifies that the caller plans to replace the targetlist,
67 * and therefore it doesn't matter a bit what target list gets generated.
68 */
69#define CP_EXACT_TLIST 0x0001 /* Plan must return specified tlist */
70#define CP_SMALL_TLIST 0x0002 /* Prefer narrower tlists */
71#define CP_LABEL_TLIST 0x0004 /* tlist must contain sortgrouprefs */
72#define CP_IGNORE_TLIST 0x0008 /* caller will replace tlist */
73
74
75static Plan *create_plan_recurse(PlannerInfo *root, Path *best_path,
76 int flags);
77static Plan *create_scan_plan(PlannerInfo *root, Path *best_path,
78 int flags);
79static List *build_path_tlist(PlannerInfo *root, Path *path);
80static bool use_physical_tlist(PlannerInfo *root, Path *path, int flags);
81static List *get_gating_quals(PlannerInfo *root, List *quals);
82static Plan *create_gating_plan(PlannerInfo *root, Path *path, Plan *plan,
83 List *gating_quals);
84static Plan *create_join_plan(PlannerInfo *root, JoinPath *best_path);
85static bool mark_async_capable_plan(Plan *plan, Path *path);
86static Plan *create_append_plan(PlannerInfo *root, AppendPath *best_path,
87 int flags);
88static Plan *create_merge_append_plan(PlannerInfo *root, MergeAppendPath *best_path,
89 int flags);
90static Result *create_group_result_plan(PlannerInfo *root,
91 GroupResultPath *best_path);
92static ProjectSet *create_project_set_plan(PlannerInfo *root, ProjectSetPath *best_path);
93static Material *create_material_plan(PlannerInfo *root, MaterialPath *best_path,
94 int flags);
95static Memoize *create_memoize_plan(PlannerInfo *root, MemoizePath *best_path,
96 int flags);
97static Gather *create_gather_plan(PlannerInfo *root, GatherPath *best_path);
98static Plan *create_projection_plan(PlannerInfo *root,
99 ProjectionPath *best_path,
100 int flags);
101static Plan *inject_projection_plan(Plan *subplan, List *tlist,
102 bool parallel_safe);
103static Sort *create_sort_plan(PlannerInfo *root, SortPath *best_path, int flags);
104static IncrementalSort *create_incrementalsort_plan(PlannerInfo *root,
105 IncrementalSortPath *best_path, int flags);
106static Group *create_group_plan(PlannerInfo *root, GroupPath *best_path);
107static Unique *create_unique_plan(PlannerInfo *root, UniquePath *best_path, int flags);
108static Agg *create_agg_plan(PlannerInfo *root, AggPath *best_path);
109static Plan *create_groupingsets_plan(PlannerInfo *root, GroupingSetsPath *best_path);
110static Result *create_minmaxagg_plan(PlannerInfo *root, MinMaxAggPath *best_path);
111static WindowAgg *create_windowagg_plan(PlannerInfo *root, WindowAggPath *best_path);
112static SetOp *create_setop_plan(PlannerInfo *root, SetOpPath *best_path,
113 int flags);
114static RecursiveUnion *create_recursiveunion_plan(PlannerInfo *root, RecursiveUnionPath *best_path);
115static LockRows *create_lockrows_plan(PlannerInfo *root, LockRowsPath *best_path,
116 int flags);
117static ModifyTable *create_modifytable_plan(PlannerInfo *root, ModifyTablePath *best_path);
118static Limit *create_limit_plan(PlannerInfo *root, LimitPath *best_path,
119 int flags);
120static SeqScan *create_seqscan_plan(PlannerInfo *root, Path *best_path,
121 List *tlist, List *scan_clauses);
122static SampleScan *create_samplescan_plan(PlannerInfo *root, Path *best_path,
123 List *tlist, List *scan_clauses);
124static Scan *create_indexscan_plan(PlannerInfo *root, IndexPath *best_path,
125 List *tlist, List *scan_clauses, bool indexonly);
126static BitmapHeapScan *create_bitmap_scan_plan(PlannerInfo *root,
127 BitmapHeapPath *best_path,
128 List *tlist, List *scan_clauses);
129static Plan *create_bitmap_subplan(PlannerInfo *root, Path *bitmapqual,
130 List **qual, List **indexqual, List **indexECs);
131static void bitmap_subplan_mark_shared(Plan *plan);
132static TidScan *create_tidscan_plan(PlannerInfo *root, TidPath *best_path,
133 List *tlist, List *scan_clauses);
134static TidRangeScan *create_tidrangescan_plan(PlannerInfo *root,
135 TidRangePath *best_path,
136 List *tlist,
137 List *scan_clauses);
138static SubqueryScan *create_subqueryscan_plan(PlannerInfo *root,
139 SubqueryScanPath *best_path,
140 List *tlist, List *scan_clauses);
141static FunctionScan *create_functionscan_plan(PlannerInfo *root, Path *best_path,
142 List *tlist, List *scan_clauses);
143static ValuesScan *create_valuesscan_plan(PlannerInfo *root, Path *best_path,
144 List *tlist, List *scan_clauses);
145static TableFuncScan *create_tablefuncscan_plan(PlannerInfo *root, Path *best_path,
146 List *tlist, List *scan_clauses);
147static CteScan *create_ctescan_plan(PlannerInfo *root, Path *best_path,
148 List *tlist, List *scan_clauses);
149static NamedTuplestoreScan *create_namedtuplestorescan_plan(PlannerInfo *root,
150 Path *best_path, List *tlist, List *scan_clauses);
151static Result *create_resultscan_plan(PlannerInfo *root, Path *best_path,
152 List *tlist, List *scan_clauses);
153static WorkTableScan *create_worktablescan_plan(PlannerInfo *root, Path *best_path,
154 List *tlist, List *scan_clauses);
155static ForeignScan *create_foreignscan_plan(PlannerInfo *root, ForeignPath *best_path,
156 List *tlist, List *scan_clauses);
157static CustomScan *create_customscan_plan(PlannerInfo *root,
158 CustomPath *best_path,
159 List *tlist, List *scan_clauses);
160static NestLoop *create_nestloop_plan(PlannerInfo *root, NestPath *best_path);
161static MergeJoin *create_mergejoin_plan(PlannerInfo *root, MergePath *best_path);
162static HashJoin *create_hashjoin_plan(PlannerInfo *root, HashPath *best_path);
163static Node *replace_nestloop_params(PlannerInfo *root, Node *expr);
164static Node *replace_nestloop_params_mutator(Node *node, PlannerInfo *root);
165static void fix_indexqual_references(PlannerInfo *root, IndexPath *index_path,
166 List **stripped_indexquals_p,
167 List **fixed_indexquals_p);
168static List *fix_indexorderby_references(PlannerInfo *root, IndexPath *index_path);
169static Node *fix_indexqual_clause(PlannerInfo *root,
170 IndexOptInfo *index, int indexcol,
171 Node *clause, List *indexcolnos);
172static Node *fix_indexqual_operand(Node *node, IndexOptInfo *index, int indexcol);
173static List *get_switched_clauses(List *clauses, Relids outerrelids);
174static List *order_qual_clauses(PlannerInfo *root, List *clauses);
175static void copy_generic_path_info(Plan *dest, Path *src);
176static void copy_plan_costsize(Plan *dest, Plan *src);
177static void label_sort_with_costsize(PlannerInfo *root, Sort *plan,
178 double limit_tuples);
179static void label_incrementalsort_with_costsize(PlannerInfo *root, IncrementalSort *plan,
180 List *pathkeys, double limit_tuples);
181static SeqScan *make_seqscan(List *qptlist, List *qpqual, Index scanrelid);
182static SampleScan *make_samplescan(List *qptlist, List *qpqual, Index scanrelid,
183 TableSampleClause *tsc);
184static IndexScan *make_indexscan(List *qptlist, List *qpqual, Index scanrelid,
185 Oid indexid, List *indexqual, List *indexqualorig,
186 List *indexorderby, List *indexorderbyorig,
187 List *indexorderbyops,
188 ScanDirection indexscandir);
189static IndexOnlyScan *make_indexonlyscan(List *qptlist, List *qpqual,
190 Index scanrelid, Oid indexid,
191 List *indexqual, List *recheckqual,
192 List *indexorderby,
193 List *indextlist,
194 ScanDirection indexscandir);
195static BitmapIndexScan *make_bitmap_indexscan(Index scanrelid, Oid indexid,
196 List *indexqual,
197 List *indexqualorig);
198static BitmapHeapScan *make_bitmap_heapscan(List *qptlist,
199 List *qpqual,
200 Plan *lefttree,
201 List *bitmapqualorig,
202 Index scanrelid);
203static TidScan *make_tidscan(List *qptlist, List *qpqual, Index scanrelid,
204 List *tidquals);
205static TidRangeScan *make_tidrangescan(List *qptlist, List *qpqual,
206 Index scanrelid, List *tidrangequals);
207static SubqueryScan *make_subqueryscan(List *qptlist,
208 List *qpqual,
209 Index scanrelid,
210 Plan *subplan);
211static FunctionScan *make_functionscan(List *qptlist, List *qpqual,
212 Index scanrelid, List *functions, bool funcordinality);
213static ValuesScan *make_valuesscan(List *qptlist, List *qpqual,
214 Index scanrelid, List *values_lists);
215static TableFuncScan *make_tablefuncscan(List *qptlist, List *qpqual,
216 Index scanrelid, TableFunc *tablefunc);
217static CteScan *make_ctescan(List *qptlist, List *qpqual,
218 Index scanrelid, int ctePlanId, int cteParam);
219static NamedTuplestoreScan *make_namedtuplestorescan(List *qptlist, List *qpqual,
220 Index scanrelid, char *enrname);
221static WorkTableScan *make_worktablescan(List *qptlist, List *qpqual,
222 Index scanrelid, int wtParam);
223static RecursiveUnion *make_recursive_union(List *tlist,
224 Plan *lefttree,
225 Plan *righttree,
226 int wtParam,
227 List *distinctList,
228 Cardinality numGroups);
229static BitmapAnd *make_bitmap_and(List *bitmapplans);
230static BitmapOr *make_bitmap_or(List *bitmapplans);
231static NestLoop *make_nestloop(List *tlist,
232 List *joinclauses, List *otherclauses, List *nestParams,
233 Plan *lefttree, Plan *righttree,
234 JoinType jointype, bool inner_unique);
235static HashJoin *make_hashjoin(List *tlist,
236 List *joinclauses, List *otherclauses,
237 List *hashclauses,
238 List *hashoperators, List *hashcollations,
239 List *hashkeys,
240 Plan *lefttree, Plan *righttree,
241 JoinType jointype, bool inner_unique);
242static Hash *make_hash(Plan *lefttree,
243 List *hashkeys,
244 Oid skewTable,
245 AttrNumber skewColumn,
246 bool skewInherit);
247static MergeJoin *make_mergejoin(List *tlist,
248 List *joinclauses, List *otherclauses,
249 List *mergeclauses,
250 Oid *mergefamilies,
251 Oid *mergecollations,
252 bool *mergereversals,
253 bool *mergenullsfirst,
254 Plan *lefttree, Plan *righttree,
255 JoinType jointype, bool inner_unique,
256 bool skip_mark_restore);
257static Sort *make_sort(Plan *lefttree, int numCols,
258 AttrNumber *sortColIdx, Oid *sortOperators,
259 Oid *collations, bool *nullsFirst);
260static IncrementalSort *make_incrementalsort(Plan *lefttree,
261 int numCols, int nPresortedCols,
262 AttrNumber *sortColIdx, Oid *sortOperators,
263 Oid *collations, bool *nullsFirst);
264static Plan *prepare_sort_from_pathkeys(Plan *lefttree, List *pathkeys,
265 Relids relids,
266 const AttrNumber *reqColIdx,
267 bool adjust_tlist_in_place,
268 int *p_numsortkeys,
269 AttrNumber **p_sortColIdx,
270 Oid **p_sortOperators,
271 Oid **p_collations,
272 bool **p_nullsFirst);
273static Sort *make_sort_from_pathkeys(Plan *lefttree, List *pathkeys,
274 Relids relids);
275static IncrementalSort *make_incrementalsort_from_pathkeys(Plan *lefttree,
276 List *pathkeys, Relids relids, int nPresortedCols);
277static Sort *make_sort_from_groupcols(List *groupcls,
278 AttrNumber *grpColIdx,
279 Plan *lefttree);
280static Material *make_material(Plan *lefttree);
281static Memoize *make_memoize(Plan *lefttree, Oid *hashoperators,
282 Oid *collations, List *param_exprs,
283 bool singlerow, bool binary_mode,
284 uint32 est_entries, Bitmapset *keyparamids,
285 Cardinality est_calls,
286 Cardinality est_unique_keys,
287 double est_hit_ratio);
288static WindowAgg *make_windowagg(List *tlist, WindowClause *wc,
289 int partNumCols, AttrNumber *partColIdx, Oid *partOperators, Oid *partCollations,
290 int ordNumCols, AttrNumber *ordColIdx, Oid *ordOperators, Oid *ordCollations,
291 List *runCondition, List *qual, bool topWindow,
292 Plan *lefttree);
293static Group *make_group(List *tlist, List *qual, int numGroupCols,
294 AttrNumber *grpColIdx, Oid *grpOperators, Oid *grpCollations,
295 Plan *lefttree);
296static Unique *make_unique_from_pathkeys(Plan *lefttree,
297 List *pathkeys, int numCols,
298 Relids relids);
299static Gather *make_gather(List *qptlist, List *qpqual,
300 int nworkers, int rescan_param, bool single_copy, Plan *subplan);
301static SetOp *make_setop(SetOpCmd cmd, SetOpStrategy strategy,
302 List *tlist, Plan *lefttree, Plan *righttree,
303 List *groupList, Cardinality numGroups);
304static LockRows *make_lockrows(Plan *lefttree, List *rowMarks, int epqParam);
305static Result *make_gating_result(List *tlist, Node *resconstantqual,
306 Plan *subplan);
307static Result *make_one_row_result(List *tlist, Node *resconstantqual,
308 RelOptInfo *rel);
309static ProjectSet *make_project_set(List *tlist, Plan *subplan);
310static ModifyTable *make_modifytable(PlannerInfo *root, Plan *subplan,
311 CmdType operation, bool canSetTag,
312 Index nominalRelation, Index rootRelation,
313 List *resultRelations,
314 List *updateColnosLists,
315 List *withCheckOptionLists, List *returningLists,
316 List *rowMarks, OnConflictExpr *onconflict,
317 List *mergeActionLists, List *mergeJoinConditions,
318 int epqParam);
319static GatherMerge *create_gather_merge_plan(PlannerInfo *root,
320 GatherMergePath *best_path);
321
322
323/*
324 * create_plan
325 * Creates the access plan for a query by recursively processing the
326 * desired tree of pathnodes, starting at the node 'best_path'. For
327 * every pathnode found, we create a corresponding plan node containing
328 * appropriate id, target list, and qualification information.
329 *
330 * The tlists and quals in the plan tree are still in planner format,
331 * ie, Vars still correspond to the parser's numbering. This will be
332 * fixed later by setrefs.c.
333 *
334 * best_path is the best access path
335 *
336 * Returns a Plan tree.
337 */
338Plan *
339create_plan(PlannerInfo *root, Path *best_path)
340{
341 Plan *plan;
342
343 /* plan_params should not be in use in current query level */
344 Assert(root->plan_params == NIL);
345
346 /* Initialize this module's workspace in PlannerInfo */
347 root->curOuterRels = NULL;
348 root->curOuterParams = NIL;
349
350 /* Recursively process the path tree, demanding the correct tlist result */
351 plan = create_plan_recurse(root, best_path, CP_EXACT_TLIST);
352
353 /*
354 * Make sure the topmost plan node's targetlist exposes the original
355 * column names and other decorative info. Targetlists generated within
356 * the planner don't bother with that stuff, but we must have it on the
357 * top-level tlist seen at execution time. However, ModifyTable plan
358 * nodes don't have a tlist matching the querytree targetlist.
359 */
360 if (!IsA(plan, ModifyTable))
361 apply_tlist_labeling(plan->targetlist, root->processed_tlist);
362
363 /*
364 * Attach any initPlans created in this query level to the topmost plan
365 * node. (In principle the initplans could go in any plan node at or
366 * above where they're referenced, but there seems no reason to put them
367 * any lower than the topmost node for the query level. Also, see
368 * comments for SS_finalize_plan before you try to change this.)
369 */
370 SS_attach_initplans(root, plan);
371
372 /* Check we successfully assigned all NestLoopParams to plan nodes */
373 if (root->curOuterParams != NIL)
374 elog(ERROR, "failed to assign all NestLoopParams to plan nodes");
375
376 /*
377 * Reset plan_params to ensure param IDs used for nestloop params are not
378 * re-used later
379 */
380 root->plan_params = NIL;
381
382 return plan;
383}
384
385/*
386 * create_plan_recurse
387 * Recursive guts of create_plan().
388 */
389static Plan *
390create_plan_recurse(PlannerInfo *root, Path *best_path, int flags)
391{
392 Plan *plan;
393
394 /* Guard against stack overflow due to overly complex plans */
395 check_stack_depth();
396
397 switch (best_path->pathtype)
398 {
399 case T_SeqScan:
400 case T_SampleScan:
401 case T_IndexScan:
402 case T_IndexOnlyScan:
403 case T_BitmapHeapScan:
404 case T_TidScan:
405 case T_TidRangeScan:
406 case T_SubqueryScan:
407 case T_FunctionScan:
408 case T_TableFuncScan:
409 case T_ValuesScan:
410 case T_CteScan:
411 case T_WorkTableScan:
412 case T_NamedTuplestoreScan:
413 case T_ForeignScan:
414 case T_CustomScan:
415 plan = create_scan_plan(root, best_path, flags);
416 break;
417 case T_HashJoin:
418 case T_MergeJoin:
419 case T_NestLoop:
420 plan = create_join_plan(root,
421 (JoinPath *) best_path);
422 break;
423 case T_Append:
424 plan = create_append_plan(root,
425 (AppendPath *) best_path,
426 flags);
427 break;
428 case T_MergeAppend:
429 plan = create_merge_append_plan(root,
430 (MergeAppendPath *) best_path,
431 flags);
432 break;
433 case T_Result:
434 if (IsA(best_path, ProjectionPath))
435 {
436 plan = create_projection_plan(root,
437 (ProjectionPath *) best_path,
438 flags);
439 }
440 else if (IsA(best_path, MinMaxAggPath))
441 {
442 plan = (Plan *) create_minmaxagg_plan(root,
443 (MinMaxAggPath *) best_path);
444 }
445 else if (IsA(best_path, GroupResultPath))
446 {
447 plan = (Plan *) create_group_result_plan(root,
448 (GroupResultPath *) best_path);
449 }
450 else
451 {
452 /* Simple RTE_RESULT base relation */
453 Assert(IsA(best_path, Path));
454 plan = create_scan_plan(root, best_path, flags);
455 }
456 break;
457 case T_ProjectSet:
458 plan = (Plan *) create_project_set_plan(root,
459 (ProjectSetPath *) best_path);
460 break;
461 case T_Material:
462 plan = (Plan *) create_material_plan(root,
463 (MaterialPath *) best_path,
464 flags);
465 break;
466 case T_Memoize:
467 plan = (Plan *) create_memoize_plan(root,
468 (MemoizePath *) best_path,
469 flags);
470 break;
471 case T_Unique:
472 plan = (Plan *) create_unique_plan(root,
473 (UniquePath *) best_path,
474 flags);
475 break;
476 case T_Gather:
477 plan = (Plan *) create_gather_plan(root,
478 (GatherPath *) best_path);
479 break;
480 case T_Sort:
481 plan = (Plan *) create_sort_plan(root,
482 (SortPath *) best_path,
483 flags);
484 break;
485 case T_IncrementalSort:
486 plan = (Plan *) create_incrementalsort_plan(root,
487 (IncrementalSortPath *) best_path,
488 flags);
489 break;
490 case T_Group:
491 plan = (Plan *) create_group_plan(root,
492 (GroupPath *) best_path);
493 break;
494 case T_Agg:
495 if (IsA(best_path, GroupingSetsPath))
496 plan = create_groupingsets_plan(root,
497 (GroupingSetsPath *) best_path);
498 else
499 {
500 Assert(IsA(best_path, AggPath));
501 plan = (Plan *) create_agg_plan(root,
502 (AggPath *) best_path);
503 }
504 break;
505 case T_WindowAgg:
506 plan = (Plan *) create_windowagg_plan(root,
507 (WindowAggPath *) best_path);
508 break;
509 case T_SetOp:
510 plan = (Plan *) create_setop_plan(root,
511 (SetOpPath *) best_path,
512 flags);
513 break;
514 case T_RecursiveUnion:
515 plan = (Plan *) create_recursiveunion_plan(root,
516 (RecursiveUnionPath *) best_path);
517 break;
518 case T_LockRows:
519 plan = (Plan *) create_lockrows_plan(root,
520 (LockRowsPath *) best_path,
521 flags);
522 break;
523 case T_ModifyTable:
524 plan = (Plan *) create_modifytable_plan(root,
525 (ModifyTablePath *) best_path);
526 break;
527 case T_Limit:
528 plan = (Plan *) create_limit_plan(root,
529 (LimitPath *) best_path,
530 flags);
531 break;
532 case T_GatherMerge:
533 plan = (Plan *) create_gather_merge_plan(root,
534 (GatherMergePath *) best_path);
535 break;
536 default:
537 elog(ERROR, "unrecognized node type: %d",
538 (int) best_path->pathtype);
539 plan = NULL; /* keep compiler quiet */
540 break;
541 }
542
543 return plan;
544}
545
546/*
547 * create_scan_plan
548 * Create a scan plan for the parent relation of 'best_path'.
549 */
550static Plan *
551create_scan_plan(PlannerInfo *root, Path *best_path, int flags)
552{
553 RelOptInfo *rel = best_path->parent;
554 List *scan_clauses;
555 List *gating_clauses;
556 List *tlist;
557 Plan *plan;
558
559 /*
560 * Extract the relevant restriction clauses from the parent relation. The
561 * executor must apply all these restrictions during the scan, except for
562 * pseudoconstants which we'll take care of below.
563 *
564 * If this is a plain indexscan or index-only scan, we need not consider
565 * restriction clauses that are implied by the index's predicate, so use
566 * indrestrictinfo not baserestrictinfo. Note that we can't do that for
567 * bitmap indexscans, since there's not necessarily a single index
568 * involved; but it doesn't matter since create_bitmap_scan_plan() will be
569 * able to get rid of such clauses anyway via predicate proof.
570 */
571 switch (best_path->pathtype)
572 {
573 case T_IndexScan:
574 case T_IndexOnlyScan:
575 scan_clauses = castNode(IndexPath, best_path)->indexinfo->indrestrictinfo;
576 break;
577 default:
578 scan_clauses = rel->baserestrictinfo;
579 break;
580 }
581
582 /*
583 * If this is a parameterized scan, we also need to enforce all the join
584 * clauses available from the outer relation(s).
585 *
586 * For paranoia's sake, don't modify the stored baserestrictinfo list.
587 */
588 if (best_path->param_info)
589 scan_clauses = list_concat_copy(scan_clauses,
590 best_path->param_info->ppi_clauses);
591
592 /*
593 * Detect whether we have any pseudoconstant quals to deal with. Then, if
594 * we'll need a gating Result node, it will be able to project, so there
595 * are no requirements on the child's tlist.
596 *
597 * If this replaces a join, it must be a foreign scan or a custom scan,
598 * and the FDW or the custom scan provider would have stored in the best
599 * path the list of RestrictInfo nodes to apply to the join; check against
600 * that list in that case.
601 */
602 if (IS_JOIN_REL(rel))
603 {
604 List *join_clauses;
605
606 Assert(best_path->pathtype == T_ForeignScan ||
607 best_path->pathtype == T_CustomScan);
608 if (best_path->pathtype == T_ForeignScan)
609 join_clauses = ((ForeignPath *) best_path)->fdw_restrictinfo;
610 else
611 join_clauses = ((CustomPath *) best_path)->custom_restrictinfo;
612
613 gating_clauses = get_gating_quals(root, join_clauses);
614 }
615 else
616 gating_clauses = get_gating_quals(root, scan_clauses);
617 if (gating_clauses)
618 flags = 0;
619
620 /*
621 * For table scans, rather than using the relation targetlist (which is
622 * only those Vars actually needed by the query), we prefer to generate a
623 * tlist containing all Vars in order. This will allow the executor to
624 * optimize away projection of the table tuples, if possible.
625 *
626 * But if the caller is going to ignore our tlist anyway, then don't
627 * bother generating one at all. We use an exact equality test here, so
628 * that this only applies when CP_IGNORE_TLIST is the only flag set.
629 */
630 if (flags == CP_IGNORE_TLIST)
631 {
632 tlist = NULL;
633 }
634 else if (use_physical_tlist(root, best_path, flags))
635 {
636 if (best_path->pathtype == T_IndexOnlyScan)
637 {
638 /* For index-only scan, the preferred tlist is the index's */
639 tlist = copyObject(((IndexPath *) best_path)->indexinfo->indextlist);
640
641 /*
642 * Transfer sortgroupref data to the replacement tlist, if
643 * requested (use_physical_tlist checked that this will work).
644 */
645 if (flags & CP_LABEL_TLIST)
646 apply_pathtarget_labeling_to_tlist(tlist, best_path->pathtarget);
647 }
648 else
649 {
650 tlist = build_physical_tlist(root, rel);
651 if (tlist == NIL)
652 {
653 /* Failed because of dropped cols, so use regular method */
654 tlist = build_path_tlist(root, best_path);
655 }
656 else
657 {
658 /* As above, transfer sortgroupref data to replacement tlist */
659 if (flags & CP_LABEL_TLIST)
660 apply_pathtarget_labeling_to_tlist(tlist, best_path->pathtarget);
661 }
662 }
663 }
664 else
665 {
666 tlist = build_path_tlist(root, best_path);
667 }
668
669 switch (best_path->pathtype)
670 {
671 case T_SeqScan:
672 plan = (Plan *) create_seqscan_plan(root,
673 best_path,
674 tlist,
675 scan_clauses);
676 break;
677
678 case T_SampleScan:
679 plan = (Plan *) create_samplescan_plan(root,
680 best_path,
681 tlist,
682 scan_clauses);
683 break;
684
685 case T_IndexScan:
686 plan = (Plan *) create_indexscan_plan(root,
687 (IndexPath *) best_path,
688 tlist,
689 scan_clauses,
690 false);
691 break;
692
693 case T_IndexOnlyScan:
694 plan = (Plan *) create_indexscan_plan(root,
695 (IndexPath *) best_path,
696 tlist,
697 scan_clauses,
698 true);
699 break;
700
701 case T_BitmapHeapScan:
702 plan = (Plan *) create_bitmap_scan_plan(root,
703 (BitmapHeapPath *) best_path,
704 tlist,
705 scan_clauses);
706 break;
707
708 case T_TidScan:
709 plan = (Plan *) create_tidscan_plan(root,
710 (TidPath *) best_path,
711 tlist,
712 scan_clauses);
713 break;
714
715 case T_TidRangeScan:
716 plan = (Plan *) create_tidrangescan_plan(root,
717 (TidRangePath *) best_path,
718 tlist,
719 scan_clauses);
720 break;
721
722 case T_SubqueryScan:
723 plan = (Plan *) create_subqueryscan_plan(root,
724 (SubqueryScanPath *) best_path,
725 tlist,
726 scan_clauses);
727 break;
728
729 case T_FunctionScan:
730 plan = (Plan *) create_functionscan_plan(root,
731 best_path,
732 tlist,
733 scan_clauses);
734 break;
735
736 case T_TableFuncScan:
737 plan = (Plan *) create_tablefuncscan_plan(root,
738 best_path,
739 tlist,
740 scan_clauses);
741 break;
742
743 case T_ValuesScan:
744 plan = (Plan *) create_valuesscan_plan(root,
745 best_path,
746 tlist,
747 scan_clauses);
748 break;
749
750 case T_CteScan:
751 plan = (Plan *) create_ctescan_plan(root,
752 best_path,
753 tlist,
754 scan_clauses);
755 break;
756
757 case T_NamedTuplestoreScan:
758 plan = (Plan *) create_namedtuplestorescan_plan(root,
759 best_path,
760 tlist,
761 scan_clauses);
762 break;
763
764 case T_Result:
765 plan = (Plan *) create_resultscan_plan(root,
766 best_path,
767 tlist,
768 scan_clauses);
769 break;
770
771 case T_WorkTableScan:
772 plan = (Plan *) create_worktablescan_plan(root,
773 best_path,
774 tlist,
775 scan_clauses);
776 break;
777
778 case T_ForeignScan:
779 plan = (Plan *) create_foreignscan_plan(root,
780 (ForeignPath *) best_path,
781 tlist,
782 scan_clauses);
783 break;
784
785 case T_CustomScan:
786 plan = (Plan *) create_customscan_plan(root,
787 (CustomPath *) best_path,
788 tlist,
789 scan_clauses);
790 break;
791
792 default:
793 elog(ERROR, "unrecognized node type: %d",
794 (int) best_path->pathtype);
795 plan = NULL; /* keep compiler quiet */
796 break;
797 }
798
799 /*
800 * If there are any pseudoconstant clauses attached to this node, insert a
801 * gating Result node that evaluates the pseudoconstants as one-time
802 * quals.
803 */
804 if (gating_clauses)
805 plan = create_gating_plan(root, best_path, plan, gating_clauses);
806
807 return plan;
808}
809
810/*
811 * Build a target list (ie, a list of TargetEntry) for the Path's output.
812 *
813 * This is almost just make_tlist_from_pathtarget(), but we also have to
814 * deal with replacing nestloop params.
815 */
816static List *
817build_path_tlist(PlannerInfo *root, Path *path)
818{
819 List *tlist = NIL;
820 Index *sortgrouprefs = path->pathtarget->sortgrouprefs;
821 int resno = 1;
822 ListCell *v;
823
824 foreach(v, path->pathtarget->exprs)
825 {
826 Node *node = (Node *) lfirst(v);
827 TargetEntry *tle;
828
829 /*
830 * If it's a parameterized path, there might be lateral references in
831 * the tlist, which need to be replaced with Params. There's no need
832 * to remake the TargetEntry nodes, so apply this to each list item
833 * separately.
834 */
835 if (path->param_info)
836 node = replace_nestloop_params(root, node);
837
838 tle = makeTargetEntry((Expr *) node,
839 resno,
840 NULL,
841 false);
842 if (sortgrouprefs)
843 tle->ressortgroupref = sortgrouprefs[resno - 1];
844
845 tlist = lappend(tlist, tle);
846 resno++;
847 }
848 return tlist;
849}
850
851/*
852 * use_physical_tlist
853 * Decide whether to use a tlist matching relation structure,
854 * rather than only those Vars actually referenced.
855 */
856static bool
857use_physical_tlist(PlannerInfo *root, Path *path, int flags)
858{
859 RelOptInfo *rel = path->parent;
860 int i;
861 ListCell *lc;
862
863 /*
864 * Forget it if either exact tlist or small tlist is demanded.
865 */
866 if (flags & (CP_EXACT_TLIST | CP_SMALL_TLIST))
867 return false;
868
869 /*
870 * We can do this for real relation scans, subquery scans, function scans,
871 * tablefunc scans, values scans, and CTE scans (but not for, eg, joins).
872 */
873 if (rel->rtekind != RTE_RELATION &&
874 rel->rtekind != RTE_SUBQUERY &&
875 rel->rtekind != RTE_FUNCTION &&
876 rel->rtekind != RTE_TABLEFUNC &&
877 rel->rtekind != RTE_VALUES &&
878 rel->rtekind != RTE_CTE)
879 return false;
880
881 /*
882 * Can't do it with inheritance cases either (mainly because Append
883 * doesn't project; this test may be unnecessary now that
884 * create_append_plan instructs its children to return an exact tlist).
885 */
886 if (rel->reloptkind != RELOPT_BASEREL)
887 return false;
888
889 /*
890 * Also, don't do it to a CustomPath; the premise that we're extracting
891 * columns from a simple physical tuple is unlikely to hold for those.
892 * (When it does make sense, the custom path creator can set up the path's
893 * pathtarget that way.)
894 */
895 if (IsA(path, CustomPath))
896 return false;
897
898 /*
899 * If a bitmap scan's tlist is empty, keep it as-is. This may allow the
900 * executor to skip heap page fetches, and in any case, the benefit of
901 * using a physical tlist instead would be minimal.
902 */
903 if (IsA(path, BitmapHeapPath) &&
904 path->pathtarget->exprs == NIL)
905 return false;
906
907 /*
908 * Can't do it if any system columns or whole-row Vars are requested.
909 * (This could possibly be fixed but would take some fragile assumptions
910 * in setrefs.c, I think.)
911 */
912 for (i = rel->min_attr; i <= 0; i++)
913 {
914 if (!bms_is_empty(rel->attr_needed[i - rel->min_attr]))
915 return false;
916 }
917
918 /*
919 * Can't do it if the rel is required to emit any placeholder expressions,
920 * either.
921 */
922 foreach(lc, root->placeholder_list)
923 {
924 PlaceHolderInfo *phinfo = (PlaceHolderInfo *) lfirst(lc);
925
926 if (bms_nonempty_difference(phinfo->ph_needed, rel->relids) &&
927 bms_is_subset(phinfo->ph_eval_at, rel->relids))
928 return false;
929 }
930
931 /*
932 * For an index-only scan, the "physical tlist" is the index's indextlist.
933 * We can only return that without a projection if all the index's columns
934 * are returnable.
935 */
936 if (path->pathtype == T_IndexOnlyScan)
937 {
938 IndexOptInfo *indexinfo = ((IndexPath *) path)->indexinfo;
939
940 for (i = 0; i < indexinfo->ncolumns; i++)
941 {
942 if (!indexinfo->canreturn[i])
943 return false;
944 }
945 }
946
947 /*
948 * Also, can't do it if CP_LABEL_TLIST is specified and path is requested
949 * to emit any sort/group columns that are not simple Vars. (If they are
950 * simple Vars, they should appear in the physical tlist, and
951 * apply_pathtarget_labeling_to_tlist will take care of getting them
952 * labeled again.) We also have to check that no two sort/group columns
953 * are the same Var, else that element of the physical tlist would need
954 * conflicting ressortgroupref labels.
955 */
956 if ((flags & CP_LABEL_TLIST) && path->pathtarget->sortgrouprefs)
957 {
958 Bitmapset *sortgroupatts = NULL;
959
960 i = 0;
961 foreach(lc, path->pathtarget->exprs)
962 {
963 Expr *expr = (Expr *) lfirst(lc);
964
965 if (path->pathtarget->sortgrouprefs[i])
966 {
967 if (expr && IsA(expr, Var))
968 {
969 int attno = ((Var *) expr)->varattno;
970
971 attno -= FirstLowInvalidHeapAttributeNumber;
972 if (bms_is_member(attno, sortgroupatts))
973 return false;
974 sortgroupatts = bms_add_member(sortgroupatts, attno);
975 }
976 else
977 return false;
978 }
979 i++;
980 }
981 }
982
983 return true;
984}
985
986/*
987 * get_gating_quals
988 * See if there are pseudoconstant quals in a node's quals list
989 *
990 * If the node's quals list includes any pseudoconstant quals,
991 * return just those quals.
992 */
993static List *
994get_gating_quals(PlannerInfo *root, List *quals)
995{
996 /* No need to look if we know there are no pseudoconstants */
997 if (!root->hasPseudoConstantQuals)
998 return NIL;
999
1000 /* Sort into desirable execution order while still in RestrictInfo form */
1001 quals = order_qual_clauses(root, quals);
1002
1003 /* Pull out any pseudoconstant quals from the RestrictInfo list */
1004 return extract_actual_clauses(quals, true);
1005}
1006
1007/*
1008 * create_gating_plan
1009 * Deal with pseudoconstant qual clauses
1010 *
1011 * Add a gating Result node atop the already-built plan.
1012 */
1013static Plan *
1014create_gating_plan(PlannerInfo *root, Path *path, Plan *plan,
1015 List *gating_quals)
1016{
1017 Result *gplan;
1018
1019 Assert(gating_quals);
1020
1021 /*
1022 * Since we need a Result node anyway, always return the path's requested
1023 * tlist; that's never a wrong choice, even if the parent node didn't ask
1024 * for CP_EXACT_TLIST.
1025 */
1026 gplan = make_gating_result(build_path_tlist(root, path),
1027 (Node *) gating_quals, plan);
1028
1029 /*
1030 * We might have had a trivial Result plan already. Stacking one Result
1031 * atop another is silly, so if that applies, just discard the input plan.
1032 * (We're assuming its targetlist is uninteresting; it should be either
1033 * the same as the result of build_path_tlist, or a simplified version.
1034 * However, we preserve the set of relids that it purports to scan and
1035 * attribute that to our replacement Result instead, and likewise for the
1036 * result_type.)
1037 */
1038 if (IsA(plan, Result))
1039 {
1040 Result *rplan = (Result *) plan;
1041
1042 gplan->plan.lefttree = NULL;
1043 gplan->relids = rplan->relids;
1044 gplan->result_type = rplan->result_type;
1045 }
1046
1047 /*
1048 * Notice that we don't change cost or size estimates when doing gating.
1049 * The costs of qual eval were already included in the subplan's cost.
1050 * Leaving the size alone amounts to assuming that the gating qual will
1051 * succeed, which is the conservative estimate for planning upper queries.
1052 * We certainly don't want to assume the output size is zero (unless the
1053 * gating qual is actually constant FALSE, and that case is dealt with in
1054 * clausesel.c). Interpolating between the two cases is silly, because it
1055 * doesn't reflect what will really happen at runtime, and besides which
1056 * in most cases we have only a very bad idea of the probability of the
1057 * gating qual being true.
1058 */
1059 copy_plan_costsize(&gplan->plan, plan);
1060
1061 /* Gating quals could be unsafe, so better use the Path's safety flag */
1062 gplan->plan.parallel_safe = path->parallel_safe;
1063
1064 return &gplan->plan;
1065}
1066
1067/*
1068 * create_join_plan
1069 * Create a join plan for 'best_path' and (recursively) plans for its
1070 * inner and outer paths.
1071 */
1072static Plan *
1073create_join_plan(PlannerInfo *root, JoinPath *best_path)
1074{
1075 Plan *plan;
1076 List *gating_clauses;
1077
1078 switch (best_path->path.pathtype)
1079 {
1080 case T_MergeJoin:
1081 plan = (Plan *) create_mergejoin_plan(root,
1082 (MergePath *) best_path);
1083 break;
1084 case T_HashJoin:
1085 plan = (Plan *) create_hashjoin_plan(root,
1086 (HashPath *) best_path);
1087 break;
1088 case T_NestLoop:
1089 plan = (Plan *) create_nestloop_plan(root,
1090 (NestPath *) best_path);
1091 break;
1092 default:
1093 elog(ERROR, "unrecognized node type: %d",
1094 (int) best_path->path.pathtype);
1095 plan = NULL; /* keep compiler quiet */
1096 break;
1097 }
1098
1099 /*
1100 * If there are any pseudoconstant clauses attached to this node, insert a
1101 * gating Result node that evaluates the pseudoconstants as one-time
1102 * quals.
1103 */
1104 gating_clauses = get_gating_quals(root, best_path->joinrestrictinfo);
1105 if (gating_clauses)
1106 plan = create_gating_plan(root, (Path *) best_path, plan,
1107 gating_clauses);
1108
1109#ifdef NOT_USED
1110
1111 /*
1112 * * Expensive function pullups may have pulled local predicates * into
1113 * this path node. Put them in the qpqual of the plan node. * JMH,
1114 * 6/15/92
1115 */
1116 if (get_loc_restrictinfo(best_path) != NIL)
1117 set_qpqual((Plan) plan,
1118 list_concat(get_qpqual((Plan) plan),
1119 get_actual_clauses(get_loc_restrictinfo(best_path))));
1120#endif
1121
1122 return plan;
1123}
1124
1125/*
1126 * mark_async_capable_plan
1127 * Check whether the Plan node created from a Path node is async-capable,
1128 * and if so, mark the Plan node as such and return true, otherwise
1129 * return false.
1130 */
1131static bool
1132mark_async_capable_plan(Plan *plan, Path *path)
1133{
1134 switch (nodeTag(path))
1135 {
1136 case T_SubqueryScanPath:
1137 {
1138 SubqueryScan *scan_plan = (SubqueryScan *) plan;
1139
1140 /*
1141 * If the generated plan node includes a gating Result node,
1142 * we can't execute it asynchronously.
1143 */
1144 if (IsA(plan, Result))
1145 return false;
1146
1147 /*
1148 * If a SubqueryScan node atop of an async-capable plan node
1149 * is deletable, consider it as async-capable.
1150 */
1151 if (trivial_subqueryscan(scan_plan) &&
1152 mark_async_capable_plan(scan_plan->subplan,
1153 ((SubqueryScanPath *) path)->subpath))
1154 break;
1155 return false;
1156 }
1157 case T_ForeignPath:
1158 {
1159 FdwRoutine *fdwroutine = path->parent->fdwroutine;
1160
1161 /*
1162 * If the generated plan node includes a gating Result node,
1163 * we can't execute it asynchronously.
1164 */
1165 if (IsA(plan, Result))
1166 return false;
1167
1168 Assert(fdwroutine != NULL);
1169 if (fdwroutine->IsForeignPathAsyncCapable != NULL &&
1170 fdwroutine->IsForeignPathAsyncCapable((ForeignPath *) path))
1171 break;
1172 return false;
1173 }
1174 case T_ProjectionPath:
1175
1176 /*
1177 * If the generated plan node includes a Result node for the
1178 * projection, we can't execute it asynchronously.
1179 */
1180 if (IsA(plan, Result))
1181 return false;
1182
1183 /*
1184 * create_projection_plan() would have pulled up the subplan, so
1185 * check the capability using the subpath.
1186 */
1187 if (mark_async_capable_plan(plan,
1188 ((ProjectionPath *) path)->subpath))
1189 return true;
1190 return false;
1191 default:
1192 return false;
1193 }
1194
1195 plan->async_capable = true;
1196
1197 return true;
1198}
1199
1200/*
1201 * create_append_plan
1202 * Create an Append plan for 'best_path' and (recursively) plans
1203 * for its subpaths.
1204 *
1205 * Returns a Plan node.
1206 */
1207static Plan *
1208create_append_plan(PlannerInfo *root, AppendPath *best_path, int flags)
1209{
1210 Append *plan;
1211 List *tlist = build_path_tlist(root, &best_path->path);
1212 int orig_tlist_length = list_length(tlist);
1213 bool tlist_was_changed = false;
1214 List *pathkeys = best_path->path.pathkeys;
1215 List *subplans = NIL;
1216 ListCell *subpaths;
1217 int nasyncplans = 0;
1218 RelOptInfo *rel = best_path->path.parent;
1219 int nodenumsortkeys = 0;
1220 AttrNumber *nodeSortColIdx = NULL;
1221 Oid *nodeSortOperators = NULL;
1222 Oid *nodeCollations = NULL;
1223 bool *nodeNullsFirst = NULL;
1224 bool consider_async = false;
1225
1226 /*
1227 * The subpaths list could be empty, if every child was proven empty by
1228 * constraint exclusion. In that case generate a dummy plan that returns
1229 * no rows.
1230 *
1231 * Note that an AppendPath with no members is also generated in certain
1232 * cases where there was no appending construct at all, but we know the
1233 * relation is empty (see set_dummy_rel_pathlist and mark_dummy_rel).
1234 */
1235 if (best_path->subpaths == NIL)
1236 {
1237 /* Generate a Result plan with constant-FALSE gating qual */
1238 Plan *plan;
1239
1240 plan = (Plan *) make_one_row_result(tlist,
1241 (Node *) list_make1(makeBoolConst(false,
1242 false)),
1243 best_path->path.parent);
1244
1245 copy_generic_path_info(plan, (Path *) best_path);
1246
1247 return plan;
1248 }
1249
1250 /*
1251 * Otherwise build an Append plan. Note that if there's just one child,
1252 * the Append is pretty useless; but we wait till setrefs.c to get rid of
1253 * it. Doing so here doesn't work because the varno of the child scan
1254 * plan won't match the parent-rel Vars it'll be asked to emit.
1255 *
1256 * We don't have the actual creation of the Append node split out into a
1257 * separate make_xxx function. This is because we want to run
1258 * prepare_sort_from_pathkeys on it before we do so on the individual
1259 * child plans, to make cross-checking the sort info easier.
1260 */
1261 plan = makeNode(Append);
1262 plan->plan.targetlist = tlist;
1263 plan->plan.qual = NIL;
1264 plan->plan.lefttree = NULL;
1265 plan->plan.righttree = NULL;
1266 plan->apprelids = rel->relids;
1267 plan->child_append_relid_sets = best_path->child_append_relid_sets;
1268
1269 if (pathkeys != NIL)
1270 {
1271 /*
1272 * Compute sort column info, and adjust the Append's tlist as needed.
1273 * Because we pass adjust_tlist_in_place = true, we may ignore the
1274 * function result; it must be the same plan node. However, we then
1275 * need to detect whether any tlist entries were added.
1276 */
1277 (void) prepare_sort_from_pathkeys((Plan *) plan, pathkeys,
1278 best_path->path.parent->relids,
1279 NULL,
1280 true,
1281 &nodenumsortkeys,
1282 &nodeSortColIdx,
1283 &nodeSortOperators,
1284 &nodeCollations,
1285 &nodeNullsFirst);
1286 tlist_was_changed = (orig_tlist_length != list_length(plan->plan.targetlist));
1287 }
1288
1289 /* If appropriate, consider async append */
1290 consider_async = (enable_async_append && pathkeys == NIL &&
1291 !best_path->path.parallel_safe &&
1292 list_length(best_path->subpaths) > 1);
1293
1294 /* Build the plan for each child */
1295 foreach(subpaths, best_path->subpaths)
1296 {
1297 Path *subpath = (Path *) lfirst(subpaths);
1298 Plan *subplan;
1299
1300 /* Must insist that all children return the same tlist */
1301 subplan = create_plan_recurse(root, subpath, CP_EXACT_TLIST);
1302
1303 /*
1304 * For ordered Appends, we must insert a Sort node if subplan isn't
1305 * sufficiently ordered.
1306 */
1307 if (pathkeys != NIL)
1308 {
1309 int numsortkeys;
1310 AttrNumber *sortColIdx;
1311 Oid *sortOperators;
1312 Oid *collations;
1313 bool *nullsFirst;
1314 int presorted_keys;
1315
1316 /*
1317 * Compute sort column info, and adjust subplan's tlist as needed.
1318 * We must apply prepare_sort_from_pathkeys even to subplans that
1319 * don't need an explicit sort, to make sure they are returning
1320 * the same sort key columns the Append expects.
1321 */
1322 subplan = prepare_sort_from_pathkeys(subplan, pathkeys,
1323 subpath->parent->relids,
1324 nodeSortColIdx,
1325 false,
1326 &numsortkeys,
1327 &sortColIdx,
1328 &sortOperators,
1329 &collations,
1330 &nullsFirst);
1331
1332 /*
1333 * Check that we got the same sort key information. We just
1334 * Assert that the sortops match, since those depend only on the
1335 * pathkeys; but it seems like a good idea to check the sort
1336 * column numbers explicitly, to ensure the tlists match up.
1337 */
1338 Assert(numsortkeys == nodenumsortkeys);
1339 if (memcmp(sortColIdx, nodeSortColIdx,
1340 numsortkeys * sizeof(AttrNumber)) != 0)
1341 elog(ERROR, "Append child's targetlist doesn't match Append");
1342 Assert(memcmp(sortOperators, nodeSortOperators,
1343 numsortkeys * sizeof(Oid)) == 0);
1344 Assert(memcmp(collations, nodeCollations,
1345 numsortkeys * sizeof(Oid)) == 0);
1346 Assert(memcmp(nullsFirst, nodeNullsFirst,
1347 numsortkeys * sizeof(bool)) == 0);
1348
1349 /* Now, insert a Sort node if subplan isn't sufficiently ordered */
1350 if (!pathkeys_count_contained_in(pathkeys, subpath->pathkeys,
1351 &presorted_keys))
1352 {
1353 Plan *sort_plan;
1354
1355 /*
1356 * We choose to use incremental sort if it is enabled and
1357 * there are presorted keys; otherwise we use full sort.
1358 */
1359 if (enable_incremental_sort && presorted_keys > 0)
1360 {
1361 sort_plan = (Plan *)
1362 make_incrementalsort(subplan, numsortkeys, presorted_keys,
1363 sortColIdx, sortOperators,
1364 collations, nullsFirst);
1365
1366 label_incrementalsort_with_costsize(root,
1367 (IncrementalSort *) sort_plan,
1368 pathkeys,
1369 best_path->limit_tuples);
1370 }
1371 else
1372 {
1373 sort_plan = (Plan *) make_sort(subplan, numsortkeys,
1374 sortColIdx, sortOperators,
1375 collations, nullsFirst);
1376
1377 label_sort_with_costsize(root, (Sort *) sort_plan,
1378 best_path->limit_tuples);
1379 }
1380
1381 subplan = sort_plan;
1382 }
1383 }
1384
1385 /* If needed, check to see if subplan can be executed asynchronously */
1386 if (consider_async && mark_async_capable_plan(subplan, subpath))
1387 {
1388 Assert(subplan->async_capable);
1389 ++nasyncplans;
1390 }
1391
1392 subplans = lappend(subplans, subplan);
1393 }
1394
1395 /* Set below if we find quals that we can use to run-time prune */
1396 plan->part_prune_index = -1;
1397
1398 /*
1399 * If any quals exist, they may be useful to perform further partition
1400 * pruning during execution. Gather information needed by the executor to
1401 * do partition pruning.
1402 */
1403 if (enable_partition_pruning)
1404 {
1405 List *prunequal;
1406
1407 prunequal = extract_actual_clauses(rel->baserestrictinfo, false);
1408
1409 if (best_path->path.param_info)
1410 {
1411 List *prmquals = best_path->path.param_info->ppi_clauses;
1412
1413 prmquals = extract_actual_clauses(prmquals, false);
1414 prmquals = (List *) replace_nestloop_params(root,
1415 (Node *) prmquals);
1416
1417 prunequal = list_concat(prunequal, prmquals);
1418 }
1419
1420 if (prunequal != NIL)
1421 plan->part_prune_index = make_partition_pruneinfo(root, rel,
1422 best_path->subpaths,
1423 prunequal);
1424 }
1425
1426 plan->appendplans = subplans;
1427 plan->nasyncplans = nasyncplans;
1428 plan->first_partial_plan = best_path->first_partial_path;
1429
1430 copy_generic_path_info(&plan->plan, (Path *) best_path);
1431
1432 /*
1433 * If prepare_sort_from_pathkeys added sort columns, but we were told to
1434 * produce either the exact tlist or a narrow tlist, we should get rid of
1435 * the sort columns again. We must inject a projection node to do so.
1436 */
1437 if (tlist_was_changed && (flags & (CP_EXACT_TLIST | CP_SMALL_TLIST)))
1438 {
1439 tlist = list_copy_head(plan->plan.targetlist, orig_tlist_length);
1440 return inject_projection_plan((Plan *) plan, tlist,
1441 plan->plan.parallel_safe);
1442 }
1443 else
1444 return (Plan *) plan;
1445}
1446
1447/*
1448 * create_merge_append_plan
1449 * Create a MergeAppend plan for 'best_path' and (recursively) plans
1450 * for its subpaths.
1451 *
1452 * Returns a Plan node.
1453 */
1454static Plan *
1455create_merge_append_plan(PlannerInfo *root, MergeAppendPath *best_path,
1456 int flags)
1457{
1458 MergeAppend *node = makeNode(MergeAppend);
1459 Plan *plan = &node->plan;
1460 List *tlist = build_path_tlist(root, &best_path->path);
1461 int orig_tlist_length = list_length(tlist);
1462 bool tlist_was_changed;
1463 List *pathkeys = best_path->path.pathkeys;
1464 List *subplans = NIL;
1465 ListCell *subpaths;
1466 RelOptInfo *rel = best_path->path.parent;
1467
1468 /*
1469 * We don't have the actual creation of the MergeAppend node split out
1470 * into a separate make_xxx function. This is because we want to run
1471 * prepare_sort_from_pathkeys on it before we do so on the individual
1472 * child plans, to make cross-checking the sort info easier.
1473 */
1474 copy_generic_path_info(plan, (Path *) best_path);
1475 plan->targetlist = tlist;
1476 plan->qual = NIL;
1477 plan->lefttree = NULL;
1478 plan->righttree = NULL;
1479 node->apprelids = rel->relids;
1480 node->child_append_relid_sets = best_path->child_append_relid_sets;
1481
1482 /*
1483 * Compute sort column info, and adjust MergeAppend's tlist as needed.
1484 * Because we pass adjust_tlist_in_place = true, we may ignore the
1485 * function result; it must be the same plan node. However, we then need
1486 * to detect whether any tlist entries were added.
1487 */
1488 (void) prepare_sort_from_pathkeys(plan, pathkeys,
1489 best_path->path.parent->relids,
1490 NULL,
1491 true,
1492 &node->numCols,
1493 &node->sortColIdx,
1494 &node->sortOperators,
1495 &node->collations,
1496 &node->nullsFirst);
1497 tlist_was_changed = (orig_tlist_length != list_length(plan->targetlist));
1498
1499 /*
1500 * Now prepare the child plans. We must apply prepare_sort_from_pathkeys
1501 * even to subplans that don't need an explicit sort, to make sure they
1502 * are returning the same sort key columns the MergeAppend expects.
1503 */
1504 foreach(subpaths, best_path->subpaths)
1505 {
1506 Path *subpath = (Path *) lfirst(subpaths);
1507 Plan *subplan;
1508 int numsortkeys;
1509 AttrNumber *sortColIdx;
1510 Oid *sortOperators;
1511 Oid *collations;
1512 bool *nullsFirst;
1513 int presorted_keys;
1514
1515 /* Build the child plan */
1516 /* Must insist that all children return the same tlist */
1517 subplan = create_plan_recurse(root, subpath, CP_EXACT_TLIST);
1518
1519 /* Compute sort column info, and adjust subplan's tlist as needed */
1520 subplan = prepare_sort_from_pathkeys(subplan, pathkeys,
1521 subpath->parent->relids,
1522 node->sortColIdx,
1523 false,
1524 &numsortkeys,
1525 &sortColIdx,
1526 &sortOperators,
1527 &collations,
1528 &nullsFirst);
1529
1530 /*
1531 * Check that we got the same sort key information. We just Assert
1532 * that the sortops match, since those depend only on the pathkeys;
1533 * but it seems like a good idea to check the sort column numbers
1534 * explicitly, to ensure the tlists really do match up.
1535 */
1536 Assert(numsortkeys == node->numCols);
1537 if (memcmp(sortColIdx, node->sortColIdx,
1538 numsortkeys * sizeof(AttrNumber)) != 0)
1539 elog(ERROR, "MergeAppend child's targetlist doesn't match MergeAppend");
1540 Assert(memcmp(sortOperators, node->sortOperators,
1541 numsortkeys * sizeof(Oid)) == 0);
1542 Assert(memcmp(collations, node->collations,
1543 numsortkeys * sizeof(Oid)) == 0);
1544 Assert(memcmp(nullsFirst, node->nullsFirst,
1545 numsortkeys * sizeof(bool)) == 0);
1546
1547 /* Now, insert a Sort node if subplan isn't sufficiently ordered */
1548 if (!pathkeys_count_contained_in(pathkeys, subpath->pathkeys,
1549 &presorted_keys))
1550 {
1551 Plan *sort_plan;
1552
1553 /*
1554 * We choose to use incremental sort if it is enabled and there
1555 * are presorted keys; otherwise we use full sort.
1556 */
1557 if (enable_incremental_sort && presorted_keys > 0)
1558 {
1559 sort_plan = (Plan *)
1560 make_incrementalsort(subplan, numsortkeys, presorted_keys,
1561 sortColIdx, sortOperators,
1562 collations, nullsFirst);
1563
1564 label_incrementalsort_with_costsize(root,
1565 (IncrementalSort *) sort_plan,
1566 pathkeys,
1567 best_path->limit_tuples);
1568 }
1569 else
1570 {
1571 sort_plan = (Plan *) make_sort(subplan, numsortkeys,
1572 sortColIdx, sortOperators,
1573 collations, nullsFirst);
1574
1575 label_sort_with_costsize(root, (Sort *) sort_plan,
1576 best_path->limit_tuples);
1577 }
1578
1579 subplan = sort_plan;
1580 }
1581
1582 subplans = lappend(subplans, subplan);
1583 }
1584
1585 /* Set below if we find quals that we can use to run-time prune */
1586 node->part_prune_index = -1;
1587
1588 /*
1589 * If any quals exist, they may be useful to perform further partition
1590 * pruning during execution. Gather information needed by the executor to
1591 * do partition pruning.
1592 */
1593 if (enable_partition_pruning)
1594 {
1595 List *prunequal;
1596
1597 prunequal = extract_actual_clauses(rel->baserestrictinfo, false);
1598
1599 /* We don't currently generate any parameterized MergeAppend paths */
1600 Assert(best_path->path.param_info == NULL);
1601
1602 if (prunequal != NIL)
1603 node->part_prune_index = make_partition_pruneinfo(root, rel,
1604 best_path->subpaths,
1605 prunequal);
1606 }
1607
1608 node->mergeplans = subplans;
1609
1610 /*
1611 * If prepare_sort_from_pathkeys added sort columns, but we were told to
1612 * produce either the exact tlist or a narrow tlist, we should get rid of
1613 * the sort columns again. We must inject a projection node to do so.
1614 */
1615 if (tlist_was_changed && (flags & (CP_EXACT_TLIST | CP_SMALL_TLIST)))
1616 {
1617 tlist = list_copy_head(plan->targetlist, orig_tlist_length);
1618 return inject_projection_plan(plan, tlist, plan->parallel_safe);
1619 }
1620 else
1621 return plan;
1622}
1623
1624/*
1625 * create_group_result_plan
1626 * Create a Result plan for 'best_path'.
1627 * This is only used for degenerate grouping cases.
1628 *
1629 * Returns a Plan node.
1630 */
1631static Result *
1632create_group_result_plan(PlannerInfo *root, GroupResultPath *best_path)
1633{
1634 Result *plan;
1635 List *tlist;
1636 List *quals;
1637
1638 tlist = build_path_tlist(root, &best_path->path);
1639
1640 /* best_path->quals is just bare clauses */
1641 quals = order_qual_clauses(root, best_path->quals);
1642
1643 plan = make_one_row_result(tlist, (Node *) quals, best_path->path.parent);
1644
1645 copy_generic_path_info(&plan->plan, (Path *) best_path);
1646
1647 return plan;
1648}
1649
1650/*
1651 * create_project_set_plan
1652 * Create a ProjectSet plan for 'best_path'.
1653 *
1654 * Returns a Plan node.
1655 */
1656static ProjectSet *
1657create_project_set_plan(PlannerInfo *root, ProjectSetPath *best_path)
1658{
1659 ProjectSet *plan;
1660 Plan *subplan;
1661 List *tlist;
1662
1663 /* Since we intend to project, we don't need to constrain child tlist */
1664 subplan = create_plan_recurse(root, best_path->subpath, 0);
1665
1666 tlist = build_path_tlist(root, &best_path->path);
1667
1668 plan = make_project_set(tlist, subplan);
1669
1670 copy_generic_path_info(&plan->plan, (Path *) best_path);
1671
1672 return plan;
1673}
1674
1675/*
1676 * create_material_plan
1677 * Create a Material plan for 'best_path' and (recursively) plans
1678 * for its subpaths.
1679 *
1680 * Returns a Plan node.
1681 */
1682static Material *
1683create_material_plan(PlannerInfo *root, MaterialPath *best_path, int flags)
1684{
1685 Material *plan;
1686 Plan *subplan;
1687
1688 /*
1689 * We don't want any excess columns in the materialized tuples, so request
1690 * a smaller tlist. Otherwise, since Material doesn't project, tlist
1691 * requirements pass through.
1692 */
1693 subplan = create_plan_recurse(root, best_path->subpath,
1694 flags | CP_SMALL_TLIST);
1695
1696 plan = make_material(subplan);
1697
1698 copy_generic_path_info(&plan->plan, (Path *) best_path);
1699
1700 return plan;
1701}
1702
1703/*
1704 * create_memoize_plan
1705 * Create a Memoize plan for 'best_path' and (recursively) plans for its
1706 * subpaths.
1707 *
1708 * Returns a Plan node.
1709 */
1710static Memoize *
1711create_memoize_plan(PlannerInfo *root, MemoizePath *best_path, int flags)
1712{
1713 Memoize *plan;
1714 Bitmapset *keyparamids;
1715 Plan *subplan;
1716 Oid *operators;
1717 Oid *collations;
1718 List *param_exprs = NIL;
1719 ListCell *lc;
1720 ListCell *lc2;
1721 int nkeys;
1722 int i;
1723
1724 subplan = create_plan_recurse(root, best_path->subpath,
1725 flags | CP_SMALL_TLIST);
1726
1727 param_exprs = (List *) replace_nestloop_params(root, (Node *)
1728 best_path->param_exprs);
1729
1730 nkeys = list_length(param_exprs);
1731 Assert(nkeys > 0);
1732 operators = palloc(nkeys * sizeof(Oid));
1733 collations = palloc(nkeys * sizeof(Oid));
1734
1735 i = 0;
1736 forboth(lc, param_exprs, lc2, best_path->hash_operators)
1737 {
1738 Expr *param_expr = (Expr *) lfirst(lc);
1739 Oid opno = lfirst_oid(lc2);
1740
1741 operators[i] = opno;
1742 collations[i] = exprCollation((Node *) param_expr);
1743 i++;
1744 }
1745
1746 keyparamids = pull_paramids((Expr *) param_exprs);
1747
1748 plan = make_memoize(subplan, operators, collations, param_exprs,
1749 best_path->singlerow, best_path->binary_mode,
1750 best_path->est_entries, keyparamids, best_path->est_calls,
1751 best_path->est_unique_keys, best_path->est_hit_ratio);
1752
1753 copy_generic_path_info(&plan->plan, (Path *) best_path);
1754
1755 return plan;
1756}
1757
1758/*
1759 * create_gather_plan
1760 *
1761 * Create a Gather plan for 'best_path' and (recursively) plans
1762 * for its subpaths.
1763 */
1764static Gather *
1765create_gather_plan(PlannerInfo *root, GatherPath *best_path)
1766{
1767 Gather *gather_plan;
1768 Plan *subplan;
1769 List *tlist;
1770
1771 /*
1772 * Push projection down to the child node. That way, the projection work
1773 * is parallelized, and there can be no system columns in the result (they
1774 * can't travel through a tuple queue because it uses MinimalTuple
1775 * representation).
1776 */
1777 subplan = create_plan_recurse(root, best_path->subpath, CP_EXACT_TLIST);
1778
1779 tlist = build_path_tlist(root, &best_path->path);
1780
1781 gather_plan = make_gather(tlist,
1782 NIL,
1783 best_path->num_workers,
1784 assign_special_exec_param(root),
1785 best_path->single_copy,
1786 subplan);
1787
1788 copy_generic_path_info(&gather_plan->plan, &best_path->path);
1789
1790 /* use parallel mode for parallel plans. */
1791 root->glob->parallelModeNeeded = true;
1792
1793 return gather_plan;
1794}
1795
1796/*
1797 * create_gather_merge_plan
1798 *
1799 * Create a Gather Merge plan for 'best_path' and (recursively)
1800 * plans for its subpaths.
1801 */
1802static GatherMerge *
1803create_gather_merge_plan(PlannerInfo *root, GatherMergePath *best_path)
1804{
1805 GatherMerge *gm_plan;
1806 Plan *subplan;
1807 List *pathkeys = best_path->path.pathkeys;
1808 List *tlist = build_path_tlist(root, &best_path->path);
1809
1810 /* As with Gather, project away columns in the workers. */
1811 subplan = create_plan_recurse(root, best_path->subpath, CP_EXACT_TLIST);
1812
1813 /* Create a shell for a GatherMerge plan. */
1814 gm_plan = makeNode(GatherMerge);
1815 gm_plan->plan.targetlist = tlist;
1816 gm_plan->num_workers = best_path->num_workers;
1817 copy_generic_path_info(&gm_plan->plan, &best_path->path);
1818
1819 /* Assign the rescan Param. */
1820 gm_plan->rescan_param = assign_special_exec_param(root);
1821
1822 /* Gather Merge is pointless with no pathkeys; use Gather instead. */
1823 Assert(pathkeys != NIL);
1824
1825 /* Compute sort column info, and adjust subplan's tlist as needed */
1826 subplan = prepare_sort_from_pathkeys(subplan, pathkeys,
1827 best_path->subpath->parent->relids,
1828 gm_plan->sortColIdx,
1829 false,
1830 &gm_plan->numCols,
1831 &gm_plan->sortColIdx,
1832 &gm_plan->sortOperators,
1833 &gm_plan->collations,
1834 &gm_plan->nullsFirst);
1835
1836 /*
1837 * All gather merge paths should have already guaranteed the necessary
1838 * sort order. See create_gather_merge_path.
1839 */
1840 Assert(pathkeys_contained_in(pathkeys, best_path->subpath->pathkeys));
1841
1842 /* Now insert the subplan under GatherMerge. */
1843 gm_plan->plan.lefttree = subplan;
1844
1845 /* use parallel mode for parallel plans. */
1846 root->glob->parallelModeNeeded = true;
1847
1848 return gm_plan;
1849}
1850
1851/*
1852 * create_projection_plan
1853 *
1854 * Create a plan tree to do a projection step and (recursively) plans
1855 * for its subpaths. We may need a Result node for the projection,
1856 * but sometimes we can just let the subplan do the work.
1857 */
1858static Plan *
1859create_projection_plan(PlannerInfo *root, ProjectionPath *best_path, int flags)
1860{
1861 Plan *plan;
1862 Plan *subplan;
1863 List *tlist;
1864 bool needs_result_node = false;
1865
1866 /*
1867 * Convert our subpath to a Plan and determine whether we need a Result
1868 * node.
1869 *
1870 * In most cases where we don't need to project, create_projection_path
1871 * will have set dummypp, but not always. First, some createplan.c
1872 * routines change the tlists of their nodes. (An example is that
1873 * create_merge_append_plan might add resjunk sort columns to a
1874 * MergeAppend.) Second, create_projection_path has no way of knowing
1875 * what path node will be placed on top of the projection path and
1876 * therefore can't predict whether it will require an exact tlist. For
1877 * both of these reasons, we have to recheck here.
1878 */
1879 if (use_physical_tlist(root, &best_path->path, flags))
1880 {
1881 /*
1882 * Our caller doesn't really care what tlist we return, so we don't
1883 * actually need to project. However, we may still need to ensure
1884 * proper sortgroupref labels, if the caller cares about those.
1885 */
1886 subplan = create_plan_recurse(root, best_path->subpath, 0);
1887 tlist = subplan->targetlist;
1888 if (flags & CP_LABEL_TLIST)
1889 apply_pathtarget_labeling_to_tlist(tlist,
1890 best_path->path.pathtarget);
1891 }
1892 else if (is_projection_capable_path(best_path->subpath))
1893 {
1894 /*
1895 * Our caller requires that we return the exact tlist, but no separate
1896 * result node is needed because the subpath is projection-capable.
1897 * Tell create_plan_recurse that we're going to ignore the tlist it
1898 * produces.
1899 */
1900 subplan = create_plan_recurse(root, best_path->subpath,
1901 CP_IGNORE_TLIST);
1902 Assert(is_projection_capable_plan(subplan));
1903 tlist = build_path_tlist(root, &best_path->path);
1904 }
1905 else
1906 {
1907 /*
1908 * It looks like we need a result node, unless by good fortune the
1909 * requested tlist is exactly the one the child wants to produce.
1910 */
1911 subplan = create_plan_recurse(root, best_path->subpath, 0);
1912 tlist = build_path_tlist(root, &best_path->path);
1913 needs_result_node = !tlist_same_exprs(tlist, subplan->targetlist);
1914 }
1915
1916 /*
1917 * If we make a different decision about whether to include a Result node
1918 * than create_projection_path did, we'll have made slightly wrong cost
1919 * estimates; but label the plan with the cost estimates we actually used,
1920 * not "corrected" ones. (XXX this could be cleaned up if we moved more
1921 * of the sortcolumn setup logic into Path creation, but that would add
1922 * expense to creating Paths we might end up not using.)
1923 */
1924 if (!needs_result_node)
1925 {
1926 /* Don't need a separate Result, just assign tlist to subplan */
1927 plan = subplan;
1928 plan->targetlist = tlist;
1929
1930 /* Label plan with the estimated costs we actually used */
1931 plan->startup_cost = best_path->path.startup_cost;
1932 plan->total_cost = best_path->path.total_cost;
1933 plan->plan_rows = best_path->path.rows;
1934 plan->plan_width = best_path->path.pathtarget->width;
1935 plan->parallel_safe = best_path->path.parallel_safe;
1936 /* ... but don't change subplan's parallel_aware flag */
1937 }
1938 else
1939 {
1940 plan = (Plan *) make_gating_result(tlist, NULL, subplan);
1941
1942 copy_generic_path_info(plan, (Path *) best_path);
1943 }
1944
1945 return plan;
1946}
1947
1948/*
1949 * inject_projection_plan
1950 * Insert a Result node to do a projection step.
1951 *
1952 * This is used in a few places where we decide on-the-fly that we need a
1953 * projection step as part of the tree generated for some Path node.
1954 * We should try to get rid of this in favor of doing it more honestly.
1955 *
1956 * One reason it's ugly is we have to be told the right parallel_safe marking
1957 * to apply (since the tlist might be unsafe even if the child plan is safe).
1958 */
1959static Plan *
1960inject_projection_plan(Plan *subplan, List *tlist, bool parallel_safe)
1961{
1962 Plan *plan;
1963
1964 plan = (Plan *) make_gating_result(tlist, NULL, subplan);
1965
1966 /*
1967 * In principle, we should charge tlist eval cost plus cpu_per_tuple per
1968 * row for the Result node. But the former has probably been factored in
1969 * already and the latter was not accounted for during Path construction,
1970 * so being formally correct might just make the EXPLAIN output look less
1971 * consistent not more so. Hence, just copy the subplan's cost.
1972 */
1973 copy_plan_costsize(plan, subplan);
1974 plan->parallel_safe = parallel_safe;
1975
1976 return plan;
1977}
1978
1979/*
1980 * change_plan_targetlist
1981 * Externally available wrapper for inject_projection_plan.
1982 *
1983 * This is meant for use by FDW plan-generation functions, which might
1984 * want to adjust the tlist computed by some subplan tree. In general,
1985 * a Result node is needed to compute the new tlist, but we can optimize
1986 * some cases.
1987 *
1988 * In most cases, tlist_parallel_safe can just be passed as the parallel_safe
1989 * flag of the FDW's own Path node.
1990 */
1991Plan *
1992change_plan_targetlist(Plan *subplan, List *tlist, bool tlist_parallel_safe)
1993{
1994 /*
1995 * If the top plan node can't do projections and its existing target list
1996 * isn't already what we need, we need to add a Result node to help it
1997 * along.
1998 */
1999 if (!is_projection_capable_plan(subplan) &&
2000 !tlist_same_exprs(tlist, subplan->targetlist))
2001 subplan = inject_projection_plan(subplan, tlist,
2002 subplan->parallel_safe &&
2003 tlist_parallel_safe);
2004 else
2005 {
2006 /* Else we can just replace the plan node's tlist */
2007 subplan->targetlist = tlist;
2008 subplan->parallel_safe &= tlist_parallel_safe;
2009 }
2010 return subplan;
2011}
2012
2013/*
2014 * create_sort_plan
2015 *
2016 * Create a Sort plan for 'best_path' and (recursively) plans
2017 * for its subpaths.
2018 */
2019static Sort *
2020create_sort_plan(PlannerInfo *root, SortPath *best_path, int flags)
2021{
2022 Sort *plan;
2023 Plan *subplan;
2024
2025 /*
2026 * We don't want any excess columns in the sorted tuples, so request a
2027 * smaller tlist. Otherwise, since Sort doesn't project, tlist
2028 * requirements pass through.
2029 */
2030 subplan = create_plan_recurse(root, best_path->subpath,
2031 flags | CP_SMALL_TLIST);
2032
2033 /*
2034 * make_sort_from_pathkeys indirectly calls find_ec_member_matching_expr,
2035 * which will ignore any child EC members that don't belong to the given
2036 * relids. Thus, if this sort path is based on a child relation, we must
2037 * pass its relids.
2038 */
2039 plan = make_sort_from_pathkeys(subplan, best_path->path.pathkeys,
2040 IS_OTHER_REL(best_path->subpath->parent) ?
2041 best_path->path.parent->relids : NULL);
2042
2043 copy_generic_path_info(&plan->plan, (Path *) best_path);
2044
2045 return plan;
2046}
2047
2048/*
2049 * create_incrementalsort_plan
2050 *
2051 * Do the same as create_sort_plan, but create IncrementalSort plan.
2052 */
2053static IncrementalSort *
2054create_incrementalsort_plan(PlannerInfo *root, IncrementalSortPath *best_path,
2055 int flags)
2056{
2057 IncrementalSort *plan;
2058 Plan *subplan;
2059
2060 /* See comments in create_sort_plan() above */
2061 subplan = create_plan_recurse(root, best_path->spath.subpath,
2062 flags | CP_SMALL_TLIST);
2063 plan = make_incrementalsort_from_pathkeys(subplan,
2064 best_path->spath.path.pathkeys,
2065 IS_OTHER_REL(best_path->spath.subpath->parent) ?
2066 best_path->spath.path.parent->relids : NULL,
2067 best_path->nPresortedCols);
2068
2069 copy_generic_path_info(&plan->sort.plan, (Path *) best_path);
2070
2071 return plan;
2072}
2073
2074/*
2075 * create_group_plan
2076 *
2077 * Create a Group plan for 'best_path' and (recursively) plans
2078 * for its subpaths.
2079 */
2080static Group *
2081create_group_plan(PlannerInfo *root, GroupPath *best_path)
2082{
2083 Group *plan;
2084 Plan *subplan;
2085 List *tlist;
2086 List *quals;
2087
2088 /*
2089 * Group can project, so no need to be terribly picky about child tlist,
2090 * but we do need grouping columns to be available
2091 */
2092 subplan = create_plan_recurse(root, best_path->subpath, CP_LABEL_TLIST);
2093
2094 tlist = build_path_tlist(root, &best_path->path);
2095
2096 quals = order_qual_clauses(root, best_path->qual);
2097
2098 plan = make_group(tlist,
2099 quals,
2100 list_length(best_path->groupClause),
2101 extract_grouping_cols(best_path->groupClause,
2102 subplan->targetlist),
2103 extract_grouping_ops(best_path->groupClause),
2104 extract_grouping_collations(best_path->groupClause,
2105 subplan->targetlist),
2106 subplan);
2107
2108 copy_generic_path_info(&plan->plan, (Path *) best_path);
2109
2110 return plan;
2111}
2112
2113/*
2114 * create_unique_plan
2115 *
2116 * Create a Unique plan for 'best_path' and (recursively) plans
2117 * for its subpaths.
2118 */
2119static Unique *
2120create_unique_plan(PlannerInfo *root, UniquePath *best_path, int flags)
2121{
2122 Unique *plan;
2123 Plan *subplan;
2124
2125 /*
2126 * Unique doesn't project, so tlist requirements pass through; moreover we
2127 * need grouping columns to be labeled.
2128 */
2129 subplan = create_plan_recurse(root, best_path->subpath,
2130 flags | CP_LABEL_TLIST);
2131
2132 /*
2133 * make_unique_from_pathkeys calls find_ec_member_matching_expr, which
2134 * will ignore any child EC members that don't belong to the given relids.
2135 * Thus, if this unique path is based on a child relation, we must pass
2136 * its relids.
2137 */
2138 plan = make_unique_from_pathkeys(subplan,
2139 best_path->path.pathkeys,
2140 best_path->numkeys,
2141 IS_OTHER_REL(best_path->path.parent) ?
2142 best_path->path.parent->relids : NULL);
2143
2144 copy_generic_path_info(&plan->plan, (Path *) best_path);
2145
2146 return plan;
2147}
2148
2149/*
2150 * create_agg_plan
2151 *
2152 * Create an Agg plan for 'best_path' and (recursively) plans
2153 * for its subpaths.
2154 */
2155static Agg *
2156create_agg_plan(PlannerInfo *root, AggPath *best_path)
2157{
2158 Agg *plan;
2159 Plan *subplan;
2160 List *tlist;
2161 List *quals;
2162
2163 /*
2164 * Agg can project, so no need to be terribly picky about child tlist, but
2165 * we do need grouping columns to be available
2166 */
2167 subplan = create_plan_recurse(root, best_path->subpath, CP_LABEL_TLIST);
2168
2169 tlist = build_path_tlist(root, &best_path->path);
2170
2171 quals = order_qual_clauses(root, best_path->qual);
2172
2173 plan = make_agg(tlist, quals,
2174 best_path->aggstrategy,
2175 best_path->aggsplit,
2176 list_length(best_path->groupClause),
2177 extract_grouping_cols(best_path->groupClause,
2178 subplan->targetlist),
2179 extract_grouping_ops(best_path->groupClause),
2180 extract_grouping_collations(best_path->groupClause,
2181 subplan->targetlist),
2182 NIL,
2183 NIL,
2184 best_path->numGroups,
2185 best_path->transitionSpace,
2186 subplan);
2187
2188 copy_generic_path_info(&plan->plan, (Path *) best_path);
2189
2190 return plan;
2191}
2192
2193/*
2194 * Given a groupclause for a collection of grouping sets, produce the
2195 * corresponding groupColIdx.
2196 *
2197 * root->grouping_map maps the tleSortGroupRef to the actual column position in
2198 * the input tuple. So we get the ref from the entries in the groupclause and
2199 * look them up there.
2200 */
2201static AttrNumber *
2202remap_groupColIdx(PlannerInfo *root, List *groupClause)
2203{
2204 AttrNumber *grouping_map = root->grouping_map;
2205 AttrNumber *new_grpColIdx;
2206 ListCell *lc;
2207 int i;
2208
2209 Assert(grouping_map);
2210
2211 new_grpColIdx = palloc0_array(AttrNumber, list_length(groupClause));
2212
2213 i = 0;
2214 foreach(lc, groupClause)
2215 {
2216 SortGroupClause *clause = lfirst(lc);
2217
2218 new_grpColIdx[i++] = grouping_map[clause->tleSortGroupRef];
2219 }
2220
2221 return new_grpColIdx;
2222}
2223
2224/*
2225 * create_groupingsets_plan
2226 * Create a plan for 'best_path' and (recursively) plans
2227 * for its subpaths.
2228 *
2229 * What we emit is an Agg plan with some vestigial Agg and Sort nodes
2230 * hanging off the side. The top Agg implements the last grouping set
2231 * specified in the GroupingSetsPath, and any additional grouping sets
2232 * each give rise to a subsidiary Agg and Sort node in the top Agg's
2233 * "chain" list. These nodes don't participate in the plan directly,
2234 * but they are a convenient way to represent the required data for
2235 * the extra steps.
2236 *
2237 * Returns a Plan node.
2238 */
2239static Plan *
2240create_groupingsets_plan(PlannerInfo *root, GroupingSetsPath *best_path)
2241{
2242 Agg *plan;
2243 Plan *subplan;
2244 List *rollups = best_path->rollups;
2245 AttrNumber *grouping_map;
2246 int maxref;
2247 List *chain;
2248 ListCell *lc;
2249
2250 /* Shouldn't get here without grouping sets */
2251 Assert(root->parse->groupingSets);
2252 Assert(rollups != NIL);
2253
2254 /*
2255 * Agg can project, so no need to be terribly picky about child tlist, but
2256 * we do need grouping columns to be available
2257 */
2258 subplan = create_plan_recurse(root, best_path->subpath, CP_LABEL_TLIST);
2259
2260 /*
2261 * Compute the mapping from tleSortGroupRef to column index in the child's
2262 * tlist. First, identify max SortGroupRef in groupClause, for array
2263 * sizing.
2264 */
2265 maxref = 0;
2266 foreach(lc, root->processed_groupClause)
2267 {
2268 SortGroupClause *gc = (SortGroupClause *) lfirst(lc);
2269
2270 if (gc->tleSortGroupRef > maxref)
2271 maxref = gc->tleSortGroupRef;
2272 }
2273
2274 grouping_map = (AttrNumber *) palloc0((maxref + 1) * sizeof(AttrNumber));
2275
2276 /* Now look up the column numbers in the child's tlist */
2277 foreach(lc, root->processed_groupClause)
2278 {
2279 SortGroupClause *gc = (SortGroupClause *) lfirst(lc);
2280 TargetEntry *tle = get_sortgroupclause_tle(gc, subplan->targetlist);
2281
2282 grouping_map[gc->tleSortGroupRef] = tle->resno;
2283 }
2284
2285 /*
2286 * During setrefs.c, we'll need the grouping_map to fix up the cols lists
2287 * in GroupingFunc nodes. Save it for setrefs.c to use.
2288 */
2289 Assert(root->grouping_map == NULL);
2290 root->grouping_map = grouping_map;
2291
2292 /*
2293 * Generate the side nodes that describe the other sort and group
2294 * operations besides the top one. Note that we don't worry about putting
2295 * accurate cost estimates in the side nodes; only the topmost Agg node's
2296 * costs will be shown by EXPLAIN.
2297 */
2298 chain = NIL;
2299 if (list_length(rollups) > 1)
2300 {
2301 bool is_first_sort = ((RollupData *) linitial(rollups))->is_hashed;
2302
2303 for_each_from(lc, rollups, 1)
2304 {
2305 RollupData *rollup = lfirst(lc);
2306 AttrNumber *new_grpColIdx;
2307 Plan *sort_plan = NULL;
2308 Plan *agg_plan;
2309 AggStrategy strat;
2310
2311 new_grpColIdx = remap_groupColIdx(root, rollup->groupClause);
2312
2313 if (!rollup->is_hashed && !is_first_sort)
2314 {
2315 sort_plan = (Plan *)
2316 make_sort_from_groupcols(rollup->groupClause,
2317 new_grpColIdx,
2318 subplan);
2319 }
2320
2321 if (!rollup->is_hashed)
2322 is_first_sort = false;
2323
2324 if (rollup->is_hashed)
2325 strat = AGG_HASHED;
2326 else if (linitial(rollup->gsets) == NIL)
2327 strat = AGG_PLAIN;
2328 else
2329 strat = AGG_SORTED;
2330
2331 agg_plan = (Plan *) make_agg(NIL,
2332 NIL,
2333 strat,
2334 AGGSPLIT_SIMPLE,
2335 list_length((List *) linitial(rollup->gsets)),
2336 new_grpColIdx,
2337 extract_grouping_ops(rollup->groupClause),
2338 extract_grouping_collations(rollup->groupClause, subplan->targetlist),
2339 rollup->gsets,
2340 NIL,
2341 rollup->numGroups,
2342 best_path->transitionSpace,
2343 sort_plan);
2344
2345 /*
2346 * Remove stuff we don't need to avoid bloating debug output.
2347 */
2348 if (sort_plan)
2349 {
2350 sort_plan->targetlist = NIL;
2351 sort_plan->lefttree = NULL;
2352 }
2353
2354 chain = lappend(chain, agg_plan);
2355 }
2356 }
2357
2358 /*
2359 * Now make the real Agg node
2360 */
2361 {
2362 RollupData *rollup = linitial(rollups);
2363 AttrNumber *top_grpColIdx;
2364 int numGroupCols;
2365
2366 top_grpColIdx = remap_groupColIdx(root, rollup->groupClause);
2367
2368 numGroupCols = list_length((List *) linitial(rollup->gsets));
2369
2370 plan = make_agg(build_path_tlist(root, &best_path->path),
2371 best_path->qual,
2372 best_path->aggstrategy,
2373 AGGSPLIT_SIMPLE,
2374 numGroupCols,
2375 top_grpColIdx,
2376 extract_grouping_ops(rollup->groupClause),
2377 extract_grouping_collations(rollup->groupClause, subplan->targetlist),
2378 rollup->gsets,
2379 chain,
2380 rollup->numGroups,
2381 best_path->transitionSpace,
2382 subplan);
2383
2384 /* Copy cost data from Path to Plan */
2385 copy_generic_path_info(&plan->plan, &best_path->path);
2386 }
2387
2388 return (Plan *) plan;
2389}
2390
2391/*
2392 * create_minmaxagg_plan
2393 *
2394 * Create a Result plan for 'best_path' and (recursively) plans
2395 * for its subpaths.
2396 */
2397static Result *
2398create_minmaxagg_plan(PlannerInfo *root, MinMaxAggPath *best_path)
2399{
2400 Result *plan;
2401 List *tlist;
2402 ListCell *lc;
2403
2404 /* Prepare an InitPlan for each aggregate's subquery. */
2405 foreach(lc, best_path->mmaggregates)
2406 {
2407 MinMaxAggInfo *mminfo = (MinMaxAggInfo *) lfirst(lc);
2408 PlannerInfo *subroot = mminfo->subroot;
2409 Query *subparse = subroot->parse;
2410 Plan *plan;
2411
2412 /*
2413 * Generate the plan for the subquery. We already have a Path, but we
2414 * have to convert it to a Plan and attach a LIMIT node above it.
2415 * Since we are entering a different planner context (subroot),
2416 * recurse to create_plan not create_plan_recurse.
2417 */
2418 plan = create_plan(subroot, mminfo->path);
2419
2420 plan = (Plan *) make_limit(plan,
2421 subparse->limitOffset,
2422 subparse->limitCount,
2423 subparse->limitOption,
2424 0, NULL, NULL, NULL);
2425
2426 /* Must apply correct cost/width data to Limit node */
2427 plan->disabled_nodes = mminfo->path->disabled_nodes;
2428 plan->startup_cost = mminfo->path->startup_cost;
2429 plan->total_cost = mminfo->pathcost;
2430 plan->plan_rows = 1;
2431 plan->plan_width = mminfo->path->pathtarget->width;
2432 plan->parallel_aware = false;
2433 plan->parallel_safe = mminfo->path->parallel_safe;
2434
2435 /* Convert the plan into an InitPlan in the outer query. */
2436 SS_make_initplan_from_plan(root, subroot, plan, mminfo->param);
2437 }
2438
2439 /* Generate the output plan --- basically just a Result */
2440 tlist = build_path_tlist(root, &best_path->path);
2441
2442 plan = make_one_row_result(tlist, (Node *) best_path->quals,
2443 best_path->path.parent);
2444 plan->result_type = RESULT_TYPE_MINMAX;
2445
2446 copy_generic_path_info(&plan->plan, (Path *) best_path);
2447
2448 /*
2449 * During setrefs.c, we'll need to replace references to the Agg nodes
2450 * with InitPlan output params. (We can't just do that locally in the
2451 * MinMaxAgg node, because path nodes above here may have Agg references
2452 * as well.) Save the mmaggregates list to tell setrefs.c to do that.
2453 */
2454 Assert(root->minmax_aggs == NIL);
2455 root->minmax_aggs = best_path->mmaggregates;
2456
2457 return plan;
2458}
2459
2460/*
2461 * create_windowagg_plan
2462 *
2463 * Create a WindowAgg plan for 'best_path' and (recursively) plans
2464 * for its subpaths.
2465 */
2466static WindowAgg *
2467create_windowagg_plan(PlannerInfo *root, WindowAggPath *best_path)
2468{
2469 WindowAgg *plan;
2470 WindowClause *wc = best_path->winclause;
2471 int numPart = list_length(wc->partitionClause);
2472 int numOrder = list_length(wc->orderClause);
2473 Plan *subplan;
2474 List *tlist;
2475 int partNumCols;
2476 AttrNumber *partColIdx;
2477 Oid *partOperators;
2478 Oid *partCollations;
2479 int ordNumCols;
2480 AttrNumber *ordColIdx;
2481 Oid *ordOperators;
2482 Oid *ordCollations;
2483 ListCell *lc;
2484
2485 /*
2486 * Choice of tlist here is motivated by the fact that WindowAgg will be
2487 * storing the input rows of window frames in a tuplestore; it therefore
2488 * behooves us to request a small tlist to avoid wasting space. We do of
2489 * course need grouping columns to be available.
2490 */
2491 subplan = create_plan_recurse(root, best_path->subpath,
2492 CP_LABEL_TLIST | CP_SMALL_TLIST);
2493
2494 tlist = build_path_tlist(root, &best_path->path);
2495
2496 /*
2497 * Convert SortGroupClause lists into arrays of attr indexes and equality
2498 * operators, as wanted by executor.
2499 */
2500 partColIdx = palloc_array(AttrNumber, numPart);
2501 partOperators = palloc_array(Oid, numPart);
2502 partCollations = palloc_array(Oid, numPart);
2503
2504 partNumCols = 0;
2505 foreach(lc, wc->partitionClause)
2506 {
2507 SortGroupClause *sgc = (SortGroupClause *) lfirst(lc);
2508 TargetEntry *tle = get_sortgroupclause_tle(sgc, subplan->targetlist);
2509
2510 Assert(OidIsValid(sgc->eqop));
2511 partColIdx[partNumCols] = tle->resno;
2512 partOperators[partNumCols] = sgc->eqop;
2513 partCollations[partNumCols] = exprCollation((Node *) tle->expr);
2514 partNumCols++;
2515 }
2516
2517 ordColIdx = palloc_array(AttrNumber, numOrder);
2518 ordOperators = palloc_array(Oid, numOrder);
2519 ordCollations = palloc_array(Oid, numOrder);
2520
2521 ordNumCols = 0;
2522 foreach(lc, wc->orderClause)
2523 {
2524 SortGroupClause *sgc = (SortGroupClause *) lfirst(lc);
2525 TargetEntry *tle = get_sortgroupclause_tle(sgc, subplan->targetlist);
2526
2527 Assert(OidIsValid(sgc->eqop));
2528 ordColIdx[ordNumCols] = tle->resno;
2529 ordOperators[ordNumCols] = sgc->eqop;
2530 ordCollations[ordNumCols] = exprCollation((Node *) tle->expr);
2531 ordNumCols++;
2532 }
2533
2534 /* And finally we can make the WindowAgg node */
2535 plan = make_windowagg(tlist,
2536 wc,
2537 partNumCols,
2538 partColIdx,
2539 partOperators,
2540 partCollations,
2541 ordNumCols,
2542 ordColIdx,
2543 ordOperators,
2544 ordCollations,
2545 best_path->runCondition,
2546 best_path->qual,
2547 best_path->topwindow,
2548 subplan);
2549
2550 copy_generic_path_info(&plan->plan, (Path *) best_path);
2551
2552 return plan;
2553}
2554
2555/*
2556 * create_setop_plan
2557 *
2558 * Create a SetOp plan for 'best_path' and (recursively) plans
2559 * for its subpaths.
2560 */
2561static SetOp *
2562create_setop_plan(PlannerInfo *root, SetOpPath *best_path, int flags)
2563{
2564 SetOp *plan;
2565 List *tlist = build_path_tlist(root, &best_path->path);
2566 Plan *leftplan;
2567 Plan *rightplan;
2568
2569 /*
2570 * SetOp doesn't project, so tlist requirements pass through; moreover we
2571 * need grouping columns to be labeled.
2572 */
2573 leftplan = create_plan_recurse(root, best_path->leftpath,
2574 flags | CP_LABEL_TLIST);
2575 rightplan = create_plan_recurse(root, best_path->rightpath,
2576 flags | CP_LABEL_TLIST);
2577
2578 plan = make_setop(best_path->cmd,
2579 best_path->strategy,
2580 tlist,
2581 leftplan,
2582 rightplan,
2583 best_path->groupList,
2584 best_path->numGroups);
2585
2586 copy_generic_path_info(&plan->plan, (Path *) best_path);
2587
2588 return plan;
2589}
2590
2591/*
2592 * create_recursiveunion_plan
2593 *
2594 * Create a RecursiveUnion plan for 'best_path' and (recursively) plans
2595 * for its subpaths.
2596 */
2597static RecursiveUnion *
2598create_recursiveunion_plan(PlannerInfo *root, RecursiveUnionPath *best_path)
2599{
2600 RecursiveUnion *plan;
2601 Plan *leftplan;
2602 Plan *rightplan;
2603 List *tlist;
2604
2605 /* Need both children to produce same tlist, so force it */
2606 leftplan = create_plan_recurse(root, best_path->leftpath, CP_EXACT_TLIST);
2607 rightplan = create_plan_recurse(root, best_path->rightpath, CP_EXACT_TLIST);
2608
2609 tlist = build_path_tlist(root, &best_path->path);
2610
2611 plan = make_recursive_union(tlist,
2612 leftplan,
2613 rightplan,
2614 best_path->wtParam,
2615 best_path->distinctList,
2616 best_path->numGroups);
2617
2618 copy_generic_path_info(&plan->plan, (Path *) best_path);
2619
2620 return plan;
2621}
2622
2623/*
2624 * create_lockrows_plan
2625 *
2626 * Create a LockRows plan for 'best_path' and (recursively) plans
2627 * for its subpaths.
2628 */
2629static LockRows *
2630create_lockrows_plan(PlannerInfo *root, LockRowsPath *best_path,
2631 int flags)
2632{
2633 LockRows *plan;
2634 Plan *subplan;
2635
2636 /* LockRows doesn't project, so tlist requirements pass through */
2637 subplan = create_plan_recurse(root, best_path->subpath, flags);
2638
2639 plan = make_lockrows(subplan, best_path->rowMarks, best_path->epqParam);
2640
2641 copy_generic_path_info(&plan->plan, (Path *) best_path);
2642
2643 return plan;
2644}
2645
2646/*
2647 * create_modifytable_plan
2648 * Create a ModifyTable plan for 'best_path'.
2649 *
2650 * Returns a Plan node.
2651 */
2652static ModifyTable *
2653create_modifytable_plan(PlannerInfo *root, ModifyTablePath *best_path)
2654{
2655 ModifyTable *plan;
2656 Path *subpath = best_path->subpath;
2657 Plan *subplan;
2658
2659 /* Subplan must produce exactly the specified tlist */
2660 subplan = create_plan_recurse(root, subpath, CP_EXACT_TLIST);
2661
2662 /* Transfer resname/resjunk labeling, too, to keep executor happy */
2663 apply_tlist_labeling(subplan->targetlist, root->processed_tlist);
2664
2665 plan = make_modifytable(root,
2666 subplan,
2667 best_path->operation,
2668 best_path->canSetTag,
2669 best_path->nominalRelation,
2670 best_path->rootRelation,
2671 best_path->resultRelations,
2672 best_path->updateColnosLists,
2673 best_path->withCheckOptionLists,
2674 best_path->returningLists,
2675 best_path->rowMarks,
2676 best_path->onconflict,
2677 best_path->mergeActionLists,
2678 best_path->mergeJoinConditions,
2679 best_path->epqParam);
2680
2681 copy_generic_path_info(&plan->plan, &best_path->path);
2682
2683 return plan;
2684}
2685
2686/*
2687 * create_limit_plan
2688 *
2689 * Create a Limit plan for 'best_path' and (recursively) plans
2690 * for its subpaths.
2691 */
2692static Limit *
2693create_limit_plan(PlannerInfo *root, LimitPath *best_path, int flags)
2694{
2695 Limit *plan;
2696 Plan *subplan;
2697 int numUniqkeys = 0;
2698 AttrNumber *uniqColIdx = NULL;
2699 Oid *uniqOperators = NULL;
2700 Oid *uniqCollations = NULL;
2701
2702 /* Limit doesn't project, so tlist requirements pass through */
2703 subplan = create_plan_recurse(root, best_path->subpath, flags);
2704
2705 /* Extract information necessary for comparing rows for WITH TIES. */
2706 if (best_path->limitOption == LIMIT_OPTION_WITH_TIES)
2707 {
2708 Query *parse = root->parse;
2709 ListCell *l;
2710
2711 numUniqkeys = list_length(parse->sortClause);
2712 uniqColIdx = (AttrNumber *) palloc(numUniqkeys * sizeof(AttrNumber));
2713 uniqOperators = (Oid *) palloc(numUniqkeys * sizeof(Oid));
2714 uniqCollations = (Oid *) palloc(numUniqkeys * sizeof(Oid));
2715
2716 numUniqkeys = 0;
2717 foreach(l, parse->sortClause)
2718 {
2719 SortGroupClause *sortcl = (SortGroupClause *) lfirst(l);
2720 TargetEntry *tle = get_sortgroupclause_tle(sortcl, parse->targetList);
2721
2722 uniqColIdx[numUniqkeys] = tle->resno;
2723 uniqOperators[numUniqkeys] = sortcl->eqop;
2724 uniqCollations[numUniqkeys] = exprCollation((Node *) tle->expr);
2725 numUniqkeys++;
2726 }
2727 }
2728
2729 plan = make_limit(subplan,
2730 best_path->limitOffset,
2731 best_path->limitCount,
2732 best_path->limitOption,
2733 numUniqkeys, uniqColIdx, uniqOperators, uniqCollations);
2734
2735 copy_generic_path_info(&plan->plan, (Path *) best_path);
2736
2737 return plan;
2738}
2739
2740
2741/*****************************************************************************
2742 *
2743 * BASE-RELATION SCAN METHODS
2744 *
2745 *****************************************************************************/
2746
2747
2748/*
2749 * create_seqscan_plan
2750 * Returns a seqscan plan for the base relation scanned by 'best_path'
2751 * with restriction clauses 'scan_clauses' and targetlist 'tlist'.
2752 */
2753static SeqScan *
2754create_seqscan_plan(PlannerInfo *root, Path *best_path,
2755 List *tlist, List *scan_clauses)
2756{
2757 SeqScan *scan_plan;
2758 Index scan_relid = best_path->parent->relid;
2759
2760 /* it should be a base rel... */
2761 Assert(scan_relid > 0);
2762 Assert(best_path->parent->rtekind == RTE_RELATION);
2763
2764 /* Sort clauses into best execution order */
2765 scan_clauses = order_qual_clauses(root, scan_clauses);
2766
2767 /* Reduce RestrictInfo list to bare expressions; ignore pseudoconstants */
2768 scan_clauses = extract_actual_clauses(scan_clauses, false);
2769
2770 /* Replace any outer-relation variables with nestloop params */
2771 if (best_path->param_info)
2772 {
2773 scan_clauses = (List *)
2774 replace_nestloop_params(root, (Node *) scan_clauses);
2775 }
2776
2777 scan_plan = make_seqscan(tlist,
2778 scan_clauses,
2779 scan_relid);
2780
2781 copy_generic_path_info(&scan_plan->scan.plan, best_path);
2782
2783 return scan_plan;
2784}
2785
2786/*
2787 * create_samplescan_plan
2788 * Returns a samplescan plan for the base relation scanned by 'best_path'
2789 * with restriction clauses 'scan_clauses' and targetlist 'tlist'.
2790 */
2791static SampleScan *
2792create_samplescan_plan(PlannerInfo *root, Path *best_path,
2793 List *tlist, List *scan_clauses)
2794{
2795 SampleScan *scan_plan;
2796 Index scan_relid = best_path->parent->relid;
2797 RangeTblEntry *rte;
2798 TableSampleClause *tsc;
2799
2800 /* it should be a base rel with a tablesample clause... */
2801 Assert(scan_relid > 0);
2802 rte = planner_rt_fetch(scan_relid, root);
2803 Assert(rte->rtekind == RTE_RELATION);
2804 tsc = rte->tablesample;
2805 Assert(tsc != NULL);
2806
2807 /* Sort clauses into best execution order */
2808 scan_clauses = order_qual_clauses(root, scan_clauses);
2809
2810 /* Reduce RestrictInfo list to bare expressions; ignore pseudoconstants */
2811 scan_clauses = extract_actual_clauses(scan_clauses, false);
2812
2813 /* Replace any outer-relation variables with nestloop params */
2814 if (best_path->param_info)
2815 {
2816 scan_clauses = (List *)
2817 replace_nestloop_params(root, (Node *) scan_clauses);
2818 tsc = (TableSampleClause *)
2819 replace_nestloop_params(root, (Node *) tsc);
2820 }
2821
2822 scan_plan = make_samplescan(tlist,
2823 scan_clauses,
2824 scan_relid,
2825 tsc);
2826
2827 copy_generic_path_info(&scan_plan->scan.plan, best_path);
2828
2829 return scan_plan;
2830}
2831
2832/*
2833 * create_indexscan_plan
2834 * Returns an indexscan plan for the base relation scanned by 'best_path'
2835 * with restriction clauses 'scan_clauses' and targetlist 'tlist'.
2836 *
2837 * We use this for both plain IndexScans and IndexOnlyScans, because the
2838 * qual preprocessing work is the same for both. Note that the caller tells
2839 * us which to build --- we don't look at best_path->path.pathtype, because
2840 * create_bitmap_subplan needs to be able to override the prior decision.
2841 */
2842static Scan *
2843create_indexscan_plan(PlannerInfo *root,
2844 IndexPath *best_path,
2845 List *tlist,
2846 List *scan_clauses,
2847 bool indexonly)
2848{
2849 Scan *scan_plan;
2850 List *indexclauses = best_path->indexclauses;
2851 List *indexorderbys = best_path->indexorderbys;
2852 Index baserelid = best_path->path.parent->relid;
2853 IndexOptInfo *indexinfo = best_path->indexinfo;
2854 Oid indexoid = indexinfo->indexoid;
2855 List *qpqual;
2856 List *stripped_indexquals;
2857 List *fixed_indexquals;
2858 List *fixed_indexorderbys;
2859 List *indexorderbyops = NIL;
2860 ListCell *l;
2861
2862 /* it should be a base rel... */
2863 Assert(baserelid > 0);
2864 Assert(best_path->path.parent->rtekind == RTE_RELATION);
2865 /* check the scan direction is valid */
2866 Assert(best_path->indexscandir == ForwardScanDirection ||
2867 best_path->indexscandir == BackwardScanDirection);
2868
2869 /*
2870 * Extract the index qual expressions (stripped of RestrictInfos) from the
2871 * IndexClauses list, and prepare a copy with index Vars substituted for
2872 * table Vars. (This step also does replace_nestloop_params on the
2873 * fixed_indexquals.)
2874 */
2875 fix_indexqual_references(root, best_path,
2876 &stripped_indexquals,
2877 &fixed_indexquals);
2878
2879 /*
2880 * Likewise fix up index attr references in the ORDER BY expressions.
2881 */
2882 fixed_indexorderbys = fix_indexorderby_references(root, best_path);
2883
2884 /*
2885 * The qpqual list must contain all restrictions not automatically handled
2886 * by the index, other than pseudoconstant clauses which will be handled
2887 * by a separate gating plan node. All the predicates in the indexquals
2888 * will be checked (either by the index itself, or by nodeIndexscan.c),
2889 * but if there are any "special" operators involved then they must be
2890 * included in qpqual. The upshot is that qpqual must contain
2891 * scan_clauses minus whatever appears in indexquals.
2892 *
2893 * is_redundant_with_indexclauses() detects cases where a scan clause is
2894 * present in the indexclauses list or is generated from the same
2895 * EquivalenceClass as some indexclause, and is therefore redundant with
2896 * it, though not equal. (The latter happens when indxpath.c prefers a
2897 * different derived equality than what generate_join_implied_equalities
2898 * picked for a parameterized scan's ppi_clauses.) Note that it will not
2899 * match to lossy index clauses, which is critical because we have to
2900 * include the original clause in qpqual in that case.
2901 *
2902 * In some situations (particularly with OR'd index conditions) we may
2903 * have scan_clauses that are not equal to, but are logically implied by,
2904 * the index quals; so we also try a predicate_implied_by() check to see
2905 * if we can discard quals that way. (predicate_implied_by assumes its
2906 * first input contains only immutable functions, so we have to check
2907 * that.)
2908 *
2909 * Note: if you change this bit of code you should also look at
2910 * extract_nonindex_conditions() in costsize.c.
2911 */
2912 qpqual = NIL;
2913 foreach(l, scan_clauses)
2914 {
2915 RestrictInfo *rinfo = lfirst_node(RestrictInfo, l);
2916
2917 if (rinfo->pseudoconstant)
2918 continue; /* we may drop pseudoconstants here */
2919 if (is_redundant_with_indexclauses(rinfo, indexclauses))
2920 continue; /* dup or derived from same EquivalenceClass */
2921 if (!contain_mutable_functions((Node *) rinfo->clause) &&
2922 predicate_implied_by(list_make1(rinfo->clause), stripped_indexquals,
2923 false))
2924 continue; /* provably implied by indexquals */
2925 qpqual = lappend(qpqual, rinfo);
2926 }
2927
2928 /* Sort clauses into best execution order */
2929 qpqual = order_qual_clauses(root, qpqual);
2930
2931 /* Reduce RestrictInfo list to bare expressions; ignore pseudoconstants */
2932 qpqual = extract_actual_clauses(qpqual, false);
2933
2934 /*
2935 * We have to replace any outer-relation variables with nestloop params in
2936 * the indexqualorig, qpqual, and indexorderbyorig expressions. A bit
2937 * annoying to have to do this separately from the processing in
2938 * fix_indexqual_references --- rethink this when generalizing the inner
2939 * indexscan support. But note we can't really do this earlier because
2940 * it'd break the comparisons to predicates above ... (or would it? Those
2941 * wouldn't have outer refs)
2942 */
2943 if (best_path->path.param_info)
2944 {
2945 stripped_indexquals = (List *)
2946 replace_nestloop_params(root, (Node *) stripped_indexquals);
2947 qpqual = (List *)
2948 replace_nestloop_params(root, (Node *) qpqual);
2949 indexorderbys = (List *)
2950 replace_nestloop_params(root, (Node *) indexorderbys);
2951 }
2952
2953 /*
2954 * If there are ORDER BY expressions, look up the sort operators for their
2955 * result datatypes.
2956 */
2957 if (indexorderbys)
2958 {
2959 ListCell *pathkeyCell,
2960 *exprCell;
2961
2962 /*
2963 * PathKey contains OID of the btree opfamily we're sorting by, but
2964 * that's not quite enough because we need the expression's datatype
2965 * to look up the sort operator in the operator family.
2966 */
2967 Assert(list_length(best_path->path.pathkeys) == list_length(indexorderbys));
2968 forboth(pathkeyCell, best_path->path.pathkeys, exprCell, indexorderbys)
2969 {
2970 PathKey *pathkey = (PathKey *) lfirst(pathkeyCell);
2971 Node *expr = (Node *) lfirst(exprCell);
2972 Oid exprtype = exprType(expr);
2973 Oid sortop;
2974
2975 /* Get sort operator from opfamily */
2976 sortop = get_opfamily_member_for_cmptype(pathkey->pk_opfamily,
2977 exprtype,
2978 exprtype,
2979 pathkey->pk_cmptype);
2980 if (!OidIsValid(sortop))
2981 elog(ERROR, "missing operator %d(%u,%u) in opfamily %u",
2982 pathkey->pk_cmptype, exprtype, exprtype, pathkey->pk_opfamily);
2983 indexorderbyops = lappend_oid(indexorderbyops, sortop);
2984 }
2985 }
2986
2987 /*
2988 * For an index-only scan, we must mark indextlist entries as resjunk if
2989 * they are columns that the index AM can't return; this cues setrefs.c to
2990 * not generate references to those columns.
2991 */
2992 if (indexonly)
2993 {
2994 int i = 0;
2995
2996 foreach(l, indexinfo->indextlist)
2997 {
2998 TargetEntry *indextle = (TargetEntry *) lfirst(l);
2999
3000 indextle->resjunk = !indexinfo->canreturn[i];
3001 i++;
3002 }
3003 }
3004
3005 /* Finally ready to build the plan node */
3006 if (indexonly)
3007 scan_plan = (Scan *) make_indexonlyscan(tlist,
3008 qpqual,
3009 baserelid,
3010 indexoid,
3011 fixed_indexquals,
3012 stripped_indexquals,
3013 fixed_indexorderbys,
3014 indexinfo->indextlist,
3015 best_path->indexscandir);
3016 else
3017 scan_plan = (Scan *) make_indexscan(tlist,
3018 qpqual,
3019 baserelid,
3020 indexoid,
3021 fixed_indexquals,
3022 stripped_indexquals,
3023 fixed_indexorderbys,
3024 indexorderbys,
3025 indexorderbyops,
3026 best_path->indexscandir);
3027
3028 copy_generic_path_info(&scan_plan->plan, &best_path->path);
3029
3030 return scan_plan;
3031}
3032
3033/*
3034 * create_bitmap_scan_plan
3035 * Returns a bitmap scan plan for the base relation scanned by 'best_path'
3036 * with restriction clauses 'scan_clauses' and targetlist 'tlist'.
3037 */
3038static BitmapHeapScan *
3039create_bitmap_scan_plan(PlannerInfo *root,
3040 BitmapHeapPath *best_path,
3041 List *tlist,
3042 List *scan_clauses)
3043{
3044 Index baserelid = best_path->path.parent->relid;
3045 Plan *bitmapqualplan;
3046 List *bitmapqualorig;
3047 List *indexquals;
3048 List *indexECs;
3049 List *qpqual;
3050 ListCell *l;
3051 BitmapHeapScan *scan_plan;
3052
3053 /* it should be a base rel... */
3054 Assert(baserelid > 0);
3055 Assert(best_path->path.parent->rtekind == RTE_RELATION);
3056
3057 /* Process the bitmapqual tree into a Plan tree and qual lists */
3058 bitmapqualplan = create_bitmap_subplan(root, best_path->bitmapqual,
3059 &bitmapqualorig, &indexquals,
3060 &indexECs);
3061
3062 if (best_path->path.parallel_aware)
3063 bitmap_subplan_mark_shared(bitmapqualplan);
3064
3065 /*
3066 * The qpqual list must contain all restrictions not automatically handled
3067 * by the index, other than pseudoconstant clauses which will be handled
3068 * by a separate gating plan node. All the predicates in the indexquals
3069 * will be checked (either by the index itself, or by
3070 * nodeBitmapHeapscan.c), but if there are any "special" operators
3071 * involved then they must be added to qpqual. The upshot is that qpqual
3072 * must contain scan_clauses minus whatever appears in indexquals.
3073 *
3074 * This loop is similar to the comparable code in create_indexscan_plan(),
3075 * but with some differences because it has to compare the scan clauses to
3076 * stripped (no RestrictInfos) indexquals. See comments there for more
3077 * info.
3078 *
3079 * In normal cases simple equal() checks will be enough to spot duplicate
3080 * clauses, so we try that first. We next see if the scan clause is
3081 * redundant with any top-level indexqual by virtue of being generated
3082 * from the same EC. After that, try predicate_implied_by().
3083 *
3084 * Unlike create_indexscan_plan(), the predicate_implied_by() test here is
3085 * useful for getting rid of qpquals that are implied by index predicates,
3086 * because the predicate conditions are included in the "indexquals"
3087 * returned by create_bitmap_subplan(). Bitmap scans have to do it that
3088 * way because predicate conditions need to be rechecked if the scan
3089 * becomes lossy, so they have to be included in bitmapqualorig.
3090 */
3091 qpqual = NIL;
3092 foreach(l, scan_clauses)
3093 {
3094 RestrictInfo *rinfo = lfirst_node(RestrictInfo, l);
3095 Node *clause = (Node *) rinfo->clause;
3096
3097 if (rinfo->pseudoconstant)
3098 continue; /* we may drop pseudoconstants here */
3099 if (list_member(indexquals, clause))
3100 continue; /* simple duplicate */
3101 if (rinfo->parent_ec && list_member_ptr(indexECs, rinfo->parent_ec))
3102 continue; /* derived from same EquivalenceClass */
3103 if (!contain_mutable_functions(clause) &&
3104 predicate_implied_by(list_make1(clause), indexquals, false))
3105 continue; /* provably implied by indexquals */
3106 qpqual = lappend(qpqual, rinfo);
3107 }
3108
3109 /* Sort clauses into best execution order */
3110 qpqual = order_qual_clauses(root, qpqual);
3111
3112 /* Reduce RestrictInfo list to bare expressions; ignore pseudoconstants */
3113 qpqual = extract_actual_clauses(qpqual, false);
3114
3115 /*
3116 * When dealing with special operators, we will at this point have
3117 * duplicate clauses in qpqual and bitmapqualorig. We may as well drop
3118 * 'em from bitmapqualorig, since there's no point in making the tests
3119 * twice.
3120 */
3121 bitmapqualorig = list_difference_ptr(bitmapqualorig, qpqual);
3122
3123 /*
3124 * We have to replace any outer-relation variables with nestloop params in
3125 * the qpqual and bitmapqualorig expressions. (This was already done for
3126 * expressions attached to plan nodes in the bitmapqualplan tree.)
3127 */
3128 if (best_path->path.param_info)
3129 {
3130 qpqual = (List *)
3131 replace_nestloop_params(root, (Node *) qpqual);
3132 bitmapqualorig = (List *)
3133 replace_nestloop_params(root, (Node *) bitmapqualorig);
3134 }
3135
3136 /* Finally ready to build the plan node */
3137 scan_plan = make_bitmap_heapscan(tlist,
3138 qpqual,
3139 bitmapqualplan,
3140 bitmapqualorig,
3141 baserelid);
3142
3143 copy_generic_path_info(&scan_plan->scan.plan, &best_path->path);
3144
3145 return scan_plan;
3146}
3147
3148/*
3149 * Given a bitmapqual tree, generate the Plan tree that implements it
3150 *
3151 * As byproducts, we also return in *qual and *indexqual the qual lists
3152 * (in implicit-AND form, without RestrictInfos) describing the original index
3153 * conditions and the generated indexqual conditions. (These are the same in
3154 * simple cases, but when special index operators are involved, the former
3155 * list includes the special conditions while the latter includes the actual
3156 * indexable conditions derived from them.) Both lists include partial-index
3157 * predicates, because we have to recheck predicates as well as index
3158 * conditions if the bitmap scan becomes lossy.
3159 *
3160 * In addition, we return a list of EquivalenceClass pointers for all the
3161 * top-level indexquals that were possibly-redundantly derived from ECs.
3162 * This allows removal of scan_clauses that are redundant with such quals.
3163 * (We do not attempt to detect such redundancies for quals that are within
3164 * OR subtrees. This could be done in a less hacky way if we returned the
3165 * indexquals in RestrictInfo form, but that would be slower and still pretty
3166 * messy, since we'd have to build new RestrictInfos in many cases.)
3167 */
3168static Plan *
3169create_bitmap_subplan(PlannerInfo *root, Path *bitmapqual,
3170 List **qual, List **indexqual, List **indexECs)
3171{
3172 Plan *plan;
3173
3174 if (IsA(bitmapqual, BitmapAndPath))
3175 {
3176 BitmapAndPath *apath = (BitmapAndPath *) bitmapqual;
3177 List *subplans = NIL;
3178 List *subquals = NIL;
3179 List *subindexquals = NIL;
3180 List *subindexECs = NIL;
3181 ListCell *l;
3182
3183 /*
3184 * There may well be redundant quals among the subplans, since a
3185 * top-level WHERE qual might have gotten used to form several
3186 * different index quals. We don't try exceedingly hard to eliminate
3187 * redundancies, but we do eliminate obvious duplicates by using
3188 * list_concat_unique.
3189 */
3190 foreach(l, apath->bitmapquals)
3191 {
3192 Plan *subplan;
3193 List *subqual;
3194 List *subindexqual;
3195 List *subindexEC;
3196
3197 subplan = create_bitmap_subplan(root, (Path *) lfirst(l),
3198 &subqual, &subindexqual,
3199 &subindexEC);
3200 subplans = lappend(subplans, subplan);
3201 subquals = list_concat_unique(subquals, subqual);
3202 subindexquals = list_concat_unique(subindexquals, subindexqual);
3203 /* Duplicates in indexECs aren't worth getting rid of */
3204 subindexECs = list_concat(subindexECs, subindexEC);
3205 }
3206 plan = (Plan *) make_bitmap_and(subplans);
3207 plan->startup_cost = apath->path.startup_cost;
3208 plan->total_cost = apath->path.total_cost;
3209 plan->plan_rows =
3210 clamp_row_est(apath->bitmapselectivity * apath->path.parent->tuples);
3211 plan->plan_width = 0; /* meaningless */
3212 plan->parallel_aware = false;
3213 plan->parallel_safe = apath->path.parallel_safe;
3214 *qual = subquals;
3215 *indexqual = subindexquals;
3216 *indexECs = subindexECs;
3217 }
3218 else if (IsA(bitmapqual, BitmapOrPath))
3219 {
3220 BitmapOrPath *opath = (BitmapOrPath *) bitmapqual;
3221 List *subplans = NIL;
3222 List *subquals = NIL;
3223 List *subindexquals = NIL;
3224 bool const_true_subqual = false;
3225 bool const_true_subindexqual = false;
3226 ListCell *l;
3227
3228 /*
3229 * Here, we only detect qual-free subplans. A qual-free subplan would
3230 * cause us to generate "... OR true ..." which we may as well reduce
3231 * to just "true". We do not try to eliminate redundant subclauses
3232 * because (a) it's not as likely as in the AND case, and (b) we might
3233 * well be working with hundreds or even thousands of OR conditions,
3234 * perhaps from a long IN list. The performance of list_append_unique
3235 * would be unacceptable.
3236 */
3237 foreach(l, opath->bitmapquals)
3238 {
3239 Plan *subplan;
3240 List *subqual;
3241 List *subindexqual;
3242 List *subindexEC;
3243
3244 subplan = create_bitmap_subplan(root, (Path *) lfirst(l),
3245 &subqual, &subindexqual,
3246 &subindexEC);
3247 subplans = lappend(subplans, subplan);
3248 if (subqual == NIL)
3249 const_true_subqual = true;
3250 else if (!const_true_subqual)
3251 subquals = lappend(subquals,
3252 make_ands_explicit(subqual));
3253 if (subindexqual == NIL)
3254 const_true_subindexqual = true;
3255 else if (!const_true_subindexqual)
3256 subindexquals = lappend(subindexquals,
3257 make_ands_explicit(subindexqual));
3258 }
3259
3260 /*
3261 * In the presence of ScalarArrayOpExpr quals, we might have built
3262 * BitmapOrPaths with just one subpath; don't add an OR step.
3263 */
3264 if (list_length(subplans) == 1)
3265 {
3266 plan = (Plan *) linitial(subplans);
3267 }
3268 else
3269 {
3270 plan = (Plan *) make_bitmap_or(subplans);
3271 plan->startup_cost = opath->path.startup_cost;
3272 plan->total_cost = opath->path.total_cost;
3273 plan->plan_rows =
3274 clamp_row_est(opath->bitmapselectivity * opath->path.parent->tuples);
3275 plan->plan_width = 0; /* meaningless */
3276 plan->parallel_aware = false;
3277 plan->parallel_safe = opath->path.parallel_safe;
3278 }
3279
3280 /*
3281 * If there were constant-TRUE subquals, the OR reduces to constant
3282 * TRUE. Also, avoid generating one-element ORs, which could happen
3283 * due to redundancy elimination or ScalarArrayOpExpr quals.
3284 */
3285 if (const_true_subqual)
3286 *qual = NIL;
3287 else if (list_length(subquals) <= 1)
3288 *qual = subquals;
3289 else
3290 *qual = list_make1(make_orclause(subquals));
3291 if (const_true_subindexqual)
3292 *indexqual = NIL;
3293 else if (list_length(subindexquals) <= 1)
3294 *indexqual = subindexquals;
3295 else
3296 *indexqual = list_make1(make_orclause(subindexquals));
3297 *indexECs = NIL;
3298 }
3299 else if (IsA(bitmapqual, IndexPath))
3300 {
3301 IndexPath *ipath = (IndexPath *) bitmapqual;
3302 IndexScan *iscan;
3303 List *subquals;
3304 List *subindexquals;
3305 List *subindexECs;
3306 ListCell *l;
3307
3308 /* Use the regular indexscan plan build machinery... */
3309 iscan = castNode(IndexScan,
3310 create_indexscan_plan(root, ipath,
3311 NIL, NIL, false));
3312 /* then convert to a bitmap indexscan */
3313 plan = (Plan *) make_bitmap_indexscan(iscan->scan.scanrelid,
3314 iscan->indexid,
3315 iscan->indexqual,
3316 iscan->indexqualorig);
3317 /* and set its cost/width fields appropriately */
3318 plan->startup_cost = 0.0;
3319 plan->total_cost = ipath->indextotalcost;
3320 plan->plan_rows =
3321 clamp_row_est(ipath->indexselectivity * ipath->path.parent->tuples);
3322 plan->plan_width = 0; /* meaningless */
3323 plan->parallel_aware = false;
3324 plan->parallel_safe = ipath->path.parallel_safe;
3325 /* Extract original index clauses, actual index quals, relevant ECs */
3326 subquals = NIL;
3327 subindexquals = NIL;
3328 subindexECs = NIL;
3329 foreach(l, ipath->indexclauses)
3330 {
3331 IndexClause *iclause = (IndexClause *) lfirst(l);
3332 RestrictInfo *rinfo = iclause->rinfo;
3333
3334 Assert(!rinfo->pseudoconstant);
3335 subquals = lappend(subquals, rinfo->clause);
3336 subindexquals = list_concat(subindexquals,
3337 get_actual_clauses(iclause->indexquals));
3338 if (rinfo->parent_ec)
3339 subindexECs = lappend(subindexECs, rinfo->parent_ec);
3340 }
3341 /* We can add any index predicate conditions, too */
3342 foreach(l, ipath->indexinfo->indpred)
3343 {
3344 Expr *pred = (Expr *) lfirst(l);
3345
3346 /*
3347 * We know that the index predicate must have been implied by the
3348 * query condition as a whole, but it may or may not be implied by
3349 * the conditions that got pushed into the bitmapqual. Avoid
3350 * generating redundant conditions.
3351 */
3352 if (!predicate_implied_by(list_make1(pred), subquals, false))
3353 {
3354 subquals = lappend(subquals, pred);
3355 subindexquals = lappend(subindexquals, pred);
3356 }
3357 }
3358 *qual = subquals;
3359 *indexqual = subindexquals;
3360 *indexECs = subindexECs;
3361 }
3362 else
3363 {
3364 elog(ERROR, "unrecognized node type: %d", nodeTag(bitmapqual));
3365 plan = NULL; /* keep compiler quiet */
3366 }
3367
3368 return plan;
3369}
3370
3371/*
3372 * create_tidscan_plan
3373 * Returns a tidscan plan for the base relation scanned by 'best_path'
3374 * with restriction clauses 'scan_clauses' and targetlist 'tlist'.
3375 */
3376static TidScan *
3377create_tidscan_plan(PlannerInfo *root, TidPath *best_path,
3378 List *tlist, List *scan_clauses)
3379{
3380 TidScan *scan_plan;
3381 Index scan_relid = best_path->path.parent->relid;
3382 List *tidquals = best_path->tidquals;
3383
3384 /* it should be a base rel... */
3385 Assert(scan_relid > 0);
3386 Assert(best_path->path.parent->rtekind == RTE_RELATION);
3387
3388 /*
3389 * The qpqual list must contain all restrictions not enforced by the
3390 * tidquals list. Since tidquals has OR semantics, we have to be careful
3391 * about matching it up to scan_clauses. It's convenient to handle the
3392 * single-tidqual case separately from the multiple-tidqual case. In the
3393 * single-tidqual case, we look through the scan_clauses while they are
3394 * still in RestrictInfo form, and drop any that are redundant with the
3395 * tidqual.
3396 *
3397 * In normal cases simple pointer equality checks will be enough to spot
3398 * duplicate RestrictInfos, so we try that first.
3399 *
3400 * Another common case is that a scan_clauses entry is generated from the
3401 * same EquivalenceClass as some tidqual, and is therefore redundant with
3402 * it, though not equal.
3403 *
3404 * Unlike indexpaths, we don't bother with predicate_implied_by(); the
3405 * number of cases where it could win are pretty small.
3406 */
3407 if (list_length(tidquals) == 1)
3408 {
3409 List *qpqual = NIL;
3410 ListCell *l;
3411
3412 foreach(l, scan_clauses)
3413 {
3414 RestrictInfo *rinfo = lfirst_node(RestrictInfo, l);
3415
3416 if (rinfo->pseudoconstant)
3417 continue; /* we may drop pseudoconstants here */
3418 if (list_member_ptr(tidquals, rinfo))
3419 continue; /* simple duplicate */
3420 if (is_redundant_derived_clause(rinfo, tidquals))
3421 continue; /* derived from same EquivalenceClass */
3422 qpqual = lappend(qpqual, rinfo);
3423 }
3424 scan_clauses = qpqual;
3425 }
3426
3427 /* Sort clauses into best execution order */
3428 scan_clauses = order_qual_clauses(root, scan_clauses);
3429
3430 /* Reduce RestrictInfo lists to bare expressions; ignore pseudoconstants */
3431 tidquals = extract_actual_clauses(tidquals, false);
3432 scan_clauses = extract_actual_clauses(scan_clauses, false);
3433
3434 /*
3435 * If we have multiple tidquals, it's more convenient to remove duplicate
3436 * scan_clauses after stripping the RestrictInfos. In this situation,
3437 * because the tidquals represent OR sub-clauses, they could not have come
3438 * from EquivalenceClasses so we don't have to worry about matching up
3439 * non-identical clauses. On the other hand, because tidpath.c will have
3440 * extracted those sub-clauses from some OR clause and built its own list,
3441 * we will certainly not have pointer equality to any scan clause. So
3442 * convert the tidquals list to an explicit OR clause and see if we can
3443 * match it via equal() to any scan clause.
3444 */
3445 if (list_length(tidquals) > 1)
3446 scan_clauses = list_difference(scan_clauses,
3447 list_make1(make_orclause(tidquals)));
3448
3449 /* Replace any outer-relation variables with nestloop params */
3450 if (best_path->path.param_info)
3451 {
3452 tidquals = (List *)
3453 replace_nestloop_params(root, (Node *) tidquals);
3454 scan_clauses = (List *)
3455 replace_nestloop_params(root, (Node *) scan_clauses);
3456 }
3457
3458 scan_plan = make_tidscan(tlist,
3459 scan_clauses,
3460 scan_relid,
3461 tidquals);
3462
3463 copy_generic_path_info(&scan_plan->scan.plan, &best_path->path);
3464
3465 return scan_plan;
3466}
3467
3468/*
3469 * create_tidrangescan_plan
3470 * Returns a tidrangescan plan for the base relation scanned by 'best_path'
3471 * with restriction clauses 'scan_clauses' and targetlist 'tlist'.
3472 */
3473static TidRangeScan *
3474create_tidrangescan_plan(PlannerInfo *root, TidRangePath *best_path,
3475 List *tlist, List *scan_clauses)
3476{
3477 TidRangeScan *scan_plan;
3478 Index scan_relid = best_path->path.parent->relid;
3479 List *tidrangequals = best_path->tidrangequals;
3480
3481 /* it should be a base rel... */
3482 Assert(scan_relid > 0);
3483 Assert(best_path->path.parent->rtekind == RTE_RELATION);
3484
3485 /*
3486 * The qpqual list must contain all restrictions not enforced by the
3487 * tidrangequals list. tidrangequals has AND semantics, so we can simply
3488 * remove any qual that appears in it.
3489 */
3490 {
3491 List *qpqual = NIL;
3492 ListCell *l;
3493
3494 foreach(l, scan_clauses)
3495 {
3496 RestrictInfo *rinfo = lfirst_node(RestrictInfo, l);
3497
3498 if (rinfo->pseudoconstant)
3499 continue; /* we may drop pseudoconstants here */
3500 if (list_member_ptr(tidrangequals, rinfo))
3501 continue; /* simple duplicate */
3502 qpqual = lappend(qpqual, rinfo);
3503 }
3504 scan_clauses = qpqual;
3505 }
3506
3507 /* Sort clauses into best execution order */
3508 scan_clauses = order_qual_clauses(root, scan_clauses);
3509
3510 /* Reduce RestrictInfo lists to bare expressions; ignore pseudoconstants */
3511 tidrangequals = extract_actual_clauses(tidrangequals, false);
3512 scan_clauses = extract_actual_clauses(scan_clauses, false);
3513
3514 /* Replace any outer-relation variables with nestloop params */
3515 if (best_path->path.param_info)
3516 {
3517 tidrangequals = (List *)
3518 replace_nestloop_params(root, (Node *) tidrangequals);
3519 scan_clauses = (List *)
3520 replace_nestloop_params(root, (Node *) scan_clauses);
3521 }
3522
3523 scan_plan = make_tidrangescan(tlist,
3524 scan_clauses,
3525 scan_relid,
3526 tidrangequals);
3527
3528 copy_generic_path_info(&scan_plan->scan.plan, &best_path->path);
3529
3530 return scan_plan;
3531}
3532
3533/*
3534 * create_subqueryscan_plan
3535 * Returns a subqueryscan plan for the base relation scanned by 'best_path'
3536 * with restriction clauses 'scan_clauses' and targetlist 'tlist'.
3537 */
3538static SubqueryScan *
3539create_subqueryscan_plan(PlannerInfo *root, SubqueryScanPath *best_path,
3540 List *tlist, List *scan_clauses)
3541{
3542 SubqueryScan *scan_plan;
3543 RelOptInfo *rel = best_path->path.parent;
3544 Index scan_relid = rel->relid;
3545 Plan *subplan;
3546
3547 /* it should be a subquery base rel... */
3548 Assert(scan_relid > 0);
3549 Assert(rel->rtekind == RTE_SUBQUERY);
3550
3551 /*
3552 * Recursively create Plan from Path for subquery. Since we are entering
3553 * a different planner context (subroot), recurse to create_plan not
3554 * create_plan_recurse.
3555 */
3556 subplan = create_plan(rel->subroot, best_path->subpath);
3557
3558 /* Sort clauses into best execution order */
3559 scan_clauses = order_qual_clauses(root, scan_clauses);
3560
3561 /* Reduce RestrictInfo list to bare expressions; ignore pseudoconstants */
3562 scan_clauses = extract_actual_clauses(scan_clauses, false);
3563
3564 /*
3565 * Replace any outer-relation variables with nestloop params.
3566 *
3567 * We must provide nestloop params for both lateral references of the
3568 * subquery and outer vars in the scan_clauses. It's better to assign the
3569 * former first, because that code path requires specific param IDs, while
3570 * replace_nestloop_params can adapt to the IDs assigned by
3571 * process_subquery_nestloop_params. This avoids possibly duplicating
3572 * nestloop params when the same Var is needed for both reasons.
3573 */
3574 if (best_path->path.param_info)
3575 {
3576 process_subquery_nestloop_params(root,
3577 rel->subplan_params);
3578 scan_clauses = (List *)
3579 replace_nestloop_params(root, (Node *) scan_clauses);
3580 }
3581
3582 scan_plan = make_subqueryscan(tlist,
3583 scan_clauses,
3584 scan_relid,
3585 subplan);
3586
3587 copy_generic_path_info(&scan_plan->scan.plan, &best_path->path);
3588
3589 return scan_plan;
3590}
3591
3592/*
3593 * create_functionscan_plan
3594 * Returns a functionscan plan for the base relation scanned by 'best_path'
3595 * with restriction clauses 'scan_clauses' and targetlist 'tlist'.
3596 */
3597static FunctionScan *
3598create_functionscan_plan(PlannerInfo *root, Path *best_path,
3599 List *tlist, List *scan_clauses)
3600{
3601 FunctionScan *scan_plan;
3602 Index scan_relid = best_path->parent->relid;
3603 RangeTblEntry *rte;
3604 List *functions;
3605
3606 /* it should be a function base rel... */
3607 Assert(scan_relid > 0);
3608 rte = planner_rt_fetch(scan_relid, root);
3609 Assert(rte->rtekind == RTE_FUNCTION);
3610 functions = rte->functions;
3611
3612 /* Sort clauses into best execution order */
3613 scan_clauses = order_qual_clauses(root, scan_clauses);
3614
3615 /* Reduce RestrictInfo list to bare expressions; ignore pseudoconstants */
3616 scan_clauses = extract_actual_clauses(scan_clauses, false);
3617
3618 /* Replace any outer-relation variables with nestloop params */
3619 if (best_path->param_info)
3620 {
3621 scan_clauses = (List *)
3622 replace_nestloop_params(root, (Node *) scan_clauses);
3623 /* The function expressions could contain nestloop params, too */
3624 functions = (List *) replace_nestloop_params(root, (Node *) functions);
3625 }
3626
3627 scan_plan = make_functionscan(tlist, scan_clauses, scan_relid,
3628 functions, rte->funcordinality);
3629
3630 copy_generic_path_info(&scan_plan->scan.plan, best_path);
3631
3632 return scan_plan;
3633}
3634
3635/*
3636 * create_tablefuncscan_plan
3637 * Returns a tablefuncscan plan for the base relation scanned by 'best_path'
3638 * with restriction clauses 'scan_clauses' and targetlist 'tlist'.
3639 */
3640static TableFuncScan *
3641create_tablefuncscan_plan(PlannerInfo *root, Path *best_path,
3642 List *tlist, List *scan_clauses)
3643{
3644 TableFuncScan *scan_plan;
3645 Index scan_relid = best_path->parent->relid;
3646 RangeTblEntry *rte;
3647 TableFunc *tablefunc;
3648
3649 /* it should be a function base rel... */
3650 Assert(scan_relid > 0);
3651 rte = planner_rt_fetch(scan_relid, root);
3652 Assert(rte->rtekind == RTE_TABLEFUNC);
3653 tablefunc = rte->tablefunc;
3654
3655 /* Sort clauses into best execution order */
3656 scan_clauses = order_qual_clauses(root, scan_clauses);
3657
3658 /* Reduce RestrictInfo list to bare expressions; ignore pseudoconstants */
3659 scan_clauses = extract_actual_clauses(scan_clauses, false);
3660
3661 /* Replace any outer-relation variables with nestloop params */
3662 if (best_path->param_info)
3663 {
3664 scan_clauses = (List *)
3665 replace_nestloop_params(root, (Node *) scan_clauses);
3666 /* The function expressions could contain nestloop params, too */
3667 tablefunc = (TableFunc *) replace_nestloop_params(root, (Node *) tablefunc);
3668 }
3669
3670 scan_plan = make_tablefuncscan(tlist, scan_clauses, scan_relid,
3671 tablefunc);
3672
3673 copy_generic_path_info(&scan_plan->scan.plan, best_path);
3674
3675 return scan_plan;
3676}
3677
3678/*
3679 * create_valuesscan_plan
3680 * Returns a valuesscan plan for the base relation scanned by 'best_path'
3681 * with restriction clauses 'scan_clauses' and targetlist 'tlist'.
3682 */
3683static ValuesScan *
3684create_valuesscan_plan(PlannerInfo *root, Path *best_path,
3685 List *tlist, List *scan_clauses)
3686{
3687 ValuesScan *scan_plan;
3688 Index scan_relid = best_path->parent->relid;
3689 RangeTblEntry *rte;
3690 List *values_lists;
3691
3692 /* it should be a values base rel... */
3693 Assert(scan_relid > 0);
3694 rte = planner_rt_fetch(scan_relid, root);
3695 Assert(rte->rtekind == RTE_VALUES);
3696 values_lists = rte->values_lists;
3697
3698 /* Sort clauses into best execution order */
3699 scan_clauses = order_qual_clauses(root, scan_clauses);
3700
3701 /* Reduce RestrictInfo list to bare expressions; ignore pseudoconstants */
3702 scan_clauses = extract_actual_clauses(scan_clauses, false);
3703
3704 /* Replace any outer-relation variables with nestloop params */
3705 if (best_path->param_info)
3706 {
3707 scan_clauses = (List *)
3708 replace_nestloop_params(root, (Node *) scan_clauses);
3709 /* The values lists could contain nestloop params, too */
3710 values_lists = (List *)
3711 replace_nestloop_params(root, (Node *) values_lists);
3712 }
3713
3714 scan_plan = make_valuesscan(tlist, scan_clauses, scan_relid,
3715 values_lists);
3716
3717 copy_generic_path_info(&scan_plan->scan.plan, best_path);
3718
3719 return scan_plan;
3720}
3721
3722/*
3723 * create_ctescan_plan
3724 * Returns a ctescan plan for the base relation scanned by 'best_path'
3725 * with restriction clauses 'scan_clauses' and targetlist 'tlist'.
3726 */
3727static CteScan *
3728create_ctescan_plan(PlannerInfo *root, Path *best_path,
3729 List *tlist, List *scan_clauses)
3730{
3731 CteScan *scan_plan;
3732 Index scan_relid = best_path->parent->relid;
3733 RangeTblEntry *rte;
3734 SubPlan *ctesplan = NULL;
3735 int plan_id;
3736 int cte_param_id;
3737 PlannerInfo *cteroot;
3738 Index levelsup;
3739 int ndx;
3740 ListCell *lc;
3741
3742 Assert(scan_relid > 0);
3743 rte = planner_rt_fetch(scan_relid, root);
3744 Assert(rte->rtekind == RTE_CTE);
3745 Assert(!rte->self_reference);
3746
3747 /*
3748 * Find the referenced CTE, and locate the SubPlan previously made for it.
3749 */
3750 levelsup = rte->ctelevelsup;
3751 cteroot = root;
3752 while (levelsup-- > 0)
3753 {
3754 cteroot = cteroot->parent_root;
3755 if (!cteroot) /* shouldn't happen */
3756 elog(ERROR, "bad levelsup for CTE \"%s\"", rte->ctename);
3757 }
3758
3759 /*
3760 * Note: cte_plan_ids can be shorter than cteList, if we are still working
3761 * on planning the CTEs (ie, this is a side-reference from another CTE).
3762 * So we mustn't use forboth here.
3763 */
3764 ndx = 0;
3765 foreach(lc, cteroot->parse->cteList)
3766 {
3767 CommonTableExpr *cte = (CommonTableExpr *) lfirst(lc);
3768
3769 if (strcmp(cte->ctename, rte->ctename) == 0)
3770 break;
3771 ndx++;
3772 }
3773 if (lc == NULL) /* shouldn't happen */
3774 elog(ERROR, "could not find CTE \"%s\"", rte->ctename);
3775 if (ndx >= list_length(cteroot->cte_plan_ids))
3776 elog(ERROR, "could not find plan for CTE \"%s\"", rte->ctename);
3777 plan_id = list_nth_int(cteroot->cte_plan_ids, ndx);
3778 if (plan_id <= 0)
3779 elog(ERROR, "no plan was made for CTE \"%s\"", rte->ctename);
3780 foreach(lc, cteroot->init_plans)
3781 {
3782 ctesplan = (SubPlan *) lfirst(lc);
3783 if (ctesplan->plan_id == plan_id)
3784 break;
3785 }
3786 if (lc == NULL) /* shouldn't happen */
3787 elog(ERROR, "could not find plan for CTE \"%s\"", rte->ctename);
3788
3789 /*
3790 * We need the CTE param ID, which is the sole member of the SubPlan's
3791 * setParam list.
3792 */
3793 cte_param_id = linitial_int(ctesplan->setParam);
3794
3795 /* Sort clauses into best execution order */
3796 scan_clauses = order_qual_clauses(root, scan_clauses);
3797
3798 /* Reduce RestrictInfo list to bare expressions; ignore pseudoconstants */
3799 scan_clauses = extract_actual_clauses(scan_clauses, false);
3800
3801 /* Replace any outer-relation variables with nestloop params */
3802 if (best_path->param_info)
3803 {
3804 scan_clauses = (List *)
3805 replace_nestloop_params(root, (Node *) scan_clauses);
3806 }
3807
3808 scan_plan = make_ctescan(tlist, scan_clauses, scan_relid,
3809 plan_id, cte_param_id);
3810
3811 copy_generic_path_info(&scan_plan->scan.plan, best_path);
3812
3813 return scan_plan;
3814}
3815
3816/*
3817 * create_namedtuplestorescan_plan
3818 * Returns a tuplestorescan plan for the base relation scanned by
3819 * 'best_path' with restriction clauses 'scan_clauses' and targetlist
3820 * 'tlist'.
3821 */
3822static NamedTuplestoreScan *
3823create_namedtuplestorescan_plan(PlannerInfo *root, Path *best_path,
3824 List *tlist, List *scan_clauses)
3825{
3826 NamedTuplestoreScan *scan_plan;
3827 Index scan_relid = best_path->parent->relid;
3828 RangeTblEntry *rte;
3829
3830 Assert(scan_relid > 0);
3831 rte = planner_rt_fetch(scan_relid, root);
3832 Assert(rte->rtekind == RTE_NAMEDTUPLESTORE);
3833
3834 /* Sort clauses into best execution order */
3835 scan_clauses = order_qual_clauses(root, scan_clauses);
3836
3837 /* Reduce RestrictInfo list to bare expressions; ignore pseudoconstants */
3838 scan_clauses = extract_actual_clauses(scan_clauses, false);
3839
3840 /* Replace any outer-relation variables with nestloop params */
3841 if (best_path->param_info)
3842 {
3843 scan_clauses = (List *)
3844 replace_nestloop_params(root, (Node *) scan_clauses);
3845 }
3846
3847 scan_plan = make_namedtuplestorescan(tlist, scan_clauses, scan_relid,
3848 rte->enrname);
3849
3850 copy_generic_path_info(&scan_plan->scan.plan, best_path);
3851
3852 return scan_plan;
3853}
3854
3855/*
3856 * create_resultscan_plan
3857 * Returns a Result plan for the RTE_RESULT base relation scanned by
3858 * 'best_path' with restriction clauses 'scan_clauses' and targetlist
3859 * 'tlist'.
3860 */
3861static Result *
3862create_resultscan_plan(PlannerInfo *root, Path *best_path,
3863 List *tlist, List *scan_clauses)
3864{
3865 Result *scan_plan;
3866 Index scan_relid = best_path->parent->relid;
3867 RangeTblEntry *rte PG_USED_FOR_ASSERTS_ONLY;
3868
3869 Assert(scan_relid > 0);
3870 rte = planner_rt_fetch(scan_relid, root);
3871 Assert(rte->rtekind == RTE_RESULT);
3872
3873 /* Sort clauses into best execution order */
3874 scan_clauses = order_qual_clauses(root, scan_clauses);
3875
3876 /* Reduce RestrictInfo list to bare expressions; ignore pseudoconstants */
3877 scan_clauses = extract_actual_clauses(scan_clauses, false);
3878
3879 /* Replace any outer-relation variables with nestloop params */
3880 if (best_path->param_info)
3881 {
3882 scan_clauses = (List *)
3883 replace_nestloop_params(root, (Node *) scan_clauses);
3884 }
3885
3886 scan_plan = make_one_row_result(tlist, (Node *) scan_clauses,
3887 best_path->parent);
3888
3889 copy_generic_path_info(&scan_plan->plan, best_path);
3890
3891 return scan_plan;
3892}
3893
3894/*
3895 * create_worktablescan_plan
3896 * Returns a worktablescan plan for the base relation scanned by 'best_path'
3897 * with restriction clauses 'scan_clauses' and targetlist 'tlist'.
3898 */
3899static WorkTableScan *
3900create_worktablescan_plan(PlannerInfo *root, Path *best_path,
3901 List *tlist, List *scan_clauses)
3902{
3903 WorkTableScan *scan_plan;
3904 Index scan_relid = best_path->parent->relid;
3905 RangeTblEntry *rte;
3906 Index levelsup;
3907 PlannerInfo *cteroot;
3908
3909 Assert(scan_relid > 0);
3910 rte = planner_rt_fetch(scan_relid, root);
3911 Assert(rte->rtekind == RTE_CTE);
3912 Assert(rte->self_reference);
3913
3914 /*
3915 * We need to find the worktable param ID, which is in the plan level
3916 * that's processing the recursive UNION, which is one level *below* where
3917 * the CTE comes from.
3918 */
3919 levelsup = rte->ctelevelsup;
3920 if (levelsup == 0) /* shouldn't happen */
3921 elog(ERROR, "bad levelsup for CTE \"%s\"", rte->ctename);
3922 levelsup--;
3923 cteroot = root;
3924 while (levelsup-- > 0)
3925 {
3926 cteroot = cteroot->parent_root;
3927 if (!cteroot) /* shouldn't happen */
3928 elog(ERROR, "bad levelsup for CTE \"%s\"", rte->ctename);
3929 }
3930 if (cteroot->wt_param_id < 0) /* shouldn't happen */
3931 elog(ERROR, "could not find param ID for CTE \"%s\"", rte->ctename);
3932
3933 /* Sort clauses into best execution order */
3934 scan_clauses = order_qual_clauses(root, scan_clauses);
3935
3936 /* Reduce RestrictInfo list to bare expressions; ignore pseudoconstants */
3937 scan_clauses = extract_actual_clauses(scan_clauses, false);
3938
3939 /* Replace any outer-relation variables with nestloop params */
3940 if (best_path->param_info)
3941 {
3942 scan_clauses = (List *)
3943 replace_nestloop_params(root, (Node *) scan_clauses);
3944 }
3945
3946 scan_plan = make_worktablescan(tlist, scan_clauses, scan_relid,
3947 cteroot->wt_param_id);
3948
3949 copy_generic_path_info(&scan_plan->scan.plan, best_path);
3950
3951 return scan_plan;
3952}
3953
3954/*
3955 * create_foreignscan_plan
3956 * Returns a foreignscan plan for the relation scanned by 'best_path'
3957 * with restriction clauses 'scan_clauses' and targetlist 'tlist'.
3958 */
3959static ForeignScan *
3960create_foreignscan_plan(PlannerInfo *root, ForeignPath *best_path,
3961 List *tlist, List *scan_clauses)
3962{
3963 ForeignScan *scan_plan;
3964 RelOptInfo *rel = best_path->path.parent;
3965 Index scan_relid = rel->relid;
3966 Oid rel_oid = InvalidOid;
3967 Plan *outer_plan = NULL;
3968
3969 Assert(rel->fdwroutine != NULL);
3970
3971 /* transform the child path if any */
3972 if (best_path->fdw_outerpath)
3973 outer_plan = create_plan_recurse(root, best_path->fdw_outerpath,
3974 CP_EXACT_TLIST);
3975
3976 /*
3977 * If we're scanning a base relation, fetch its OID. (Irrelevant if
3978 * scanning a join relation.)
3979 */
3980 if (scan_relid > 0)
3981 {
3982 RangeTblEntry *rte;
3983
3984 Assert(rel->rtekind == RTE_RELATION);
3985 rte = planner_rt_fetch(scan_relid, root);
3986 Assert(rte->rtekind == RTE_RELATION);
3987 rel_oid = rte->relid;
3988 }
3989
3990 /*
3991 * Sort clauses into best execution order. We do this first since the FDW
3992 * might have more info than we do and wish to adjust the ordering.
3993 */
3994 scan_clauses = order_qual_clauses(root, scan_clauses);
3995
3996 /*
3997 * Let the FDW perform its processing on the restriction clauses and
3998 * generate the plan node. Note that the FDW might remove restriction
3999 * clauses that it intends to execute remotely, or even add more (if it
4000 * has selected some join clauses for remote use but also wants them
4001 * rechecked locally).
4002 */
4003 scan_plan = rel->fdwroutine->GetForeignPlan(root, rel, rel_oid,
4004 best_path,
4005 tlist, scan_clauses,
4006 outer_plan);
4007
4008 /* Copy cost data from Path to Plan; no need to make FDW do this */
4009 copy_generic_path_info(&scan_plan->scan.plan, &best_path->path);
4010
4011 /* Copy user OID to access as; likewise no need to make FDW do this */
4012 scan_plan->checkAsUser = rel->userid;
4013
4014 /* Copy foreign server OID; likewise, no need to make FDW do this */
4015 scan_plan->fs_server = rel->serverid;
4016
4017 /*
4018 * Likewise, copy the relids that are represented by this foreign scan. An
4019 * upper rel doesn't have relids set, but it covers all the relations
4020 * participating in the underlying scan/join, so use root->all_query_rels.
4021 */
4022 if (rel->reloptkind == RELOPT_UPPER_REL)
4023 scan_plan->fs_relids = root->all_query_rels;
4024 else
4025 scan_plan->fs_relids = best_path->path.parent->relids;
4026
4027 /*
4028 * Join relid sets include relevant outer joins, but FDWs may need to know
4029 * which are the included base rels. That's a bit tedious to get without
4030 * access to the plan-time data structures, so compute it here.
4031 */
4032 scan_plan->fs_base_relids = bms_difference(scan_plan->fs_relids,
4033 root->outer_join_rels);
4034
4035 /*
4036 * If this is a foreign join, and to make it valid to push down we had to
4037 * assume that the current user is the same as some user explicitly named
4038 * in the query, mark the finished plan as depending on the current user.
4039 */
4040 if (rel->useridiscurrent)
4041 root->glob->dependsOnRole = true;
4042
4043 /*
4044 * Replace any outer-relation variables with nestloop params in the qual,
4045 * fdw_exprs and fdw_recheck_quals expressions. We do this last so that
4046 * the FDW doesn't have to be involved. (Note that parts of fdw_exprs or
4047 * fdw_recheck_quals could have come from join clauses, so doing this
4048 * beforehand on the scan_clauses wouldn't work.) We assume
4049 * fdw_scan_tlist contains no such variables.
4050 */
4051 if (best_path->path.param_info)
4052 {
4053 scan_plan->scan.plan.qual = (List *)
4054 replace_nestloop_params(root, (Node *) scan_plan->scan.plan.qual);
4055 scan_plan->fdw_exprs = (List *)
4056 replace_nestloop_params(root, (Node *) scan_plan->fdw_exprs);
4057 scan_plan->fdw_recheck_quals = (List *)
4058 replace_nestloop_params(root,
4059 (Node *) scan_plan->fdw_recheck_quals);
4060 }
4061
4062 /*
4063 * If rel is a base relation, detect whether any system columns are
4064 * requested from the rel. (If rel is a join relation, rel->relid will be
4065 * 0, but there can be no Var with relid 0 in the rel's targetlist or the
4066 * restriction clauses, so we skip this in that case. Note that any such
4067 * columns in base relations that were joined are assumed to be contained
4068 * in fdw_scan_tlist.) This is a bit of a kluge and might go away
4069 * someday, so we intentionally leave it out of the API presented to FDWs.
4070 */
4071 scan_plan->fsSystemCol = false;
4072 if (scan_relid > 0)
4073 {
4074 Bitmapset *attrs_used = NULL;
4075 ListCell *lc;
4076 int i;
4077
4078 /*
4079 * First, examine all the attributes needed for joins or final output.
4080 * Note: we must look at rel's targetlist, not the attr_needed data,
4081 * because attr_needed isn't computed for inheritance child rels.
4082 */
4083 pull_varattnos((Node *) rel->reltarget->exprs, scan_relid, &attrs_used);
4084
4085 /* Add all the attributes used by restriction clauses. */
4086 foreach(lc, rel->baserestrictinfo)
4087 {
4088 RestrictInfo *rinfo = (RestrictInfo *) lfirst(lc);
4089
4090 pull_varattnos((Node *) rinfo->clause, scan_relid, &attrs_used);
4091 }
4092
4093 /* Now, are any system columns requested from rel? */
4094 for (i = FirstLowInvalidHeapAttributeNumber + 1; i < 0; i++)
4095 {
4096 if (bms_is_member(i - FirstLowInvalidHeapAttributeNumber, attrs_used))
4097 {
4098 scan_plan->fsSystemCol = true;
4099 break;
4100 }
4101 }
4102
4103 bms_free(attrs_used);
4104 }
4105
4106 return scan_plan;
4107}
4108
4109/*
4110 * create_customscan_plan
4111 *
4112 * Transform a CustomPath into a Plan.
4113 */
4114static CustomScan *
4115create_customscan_plan(PlannerInfo *root, CustomPath *best_path,
4116 List *tlist, List *scan_clauses)
4117{
4118 CustomScan *cplan;
4119 RelOptInfo *rel = best_path->path.parent;
4120 List *custom_plans = NIL;
4121 ListCell *lc;
4122
4123 /* Recursively transform child paths. */
4124 foreach(lc, best_path->custom_paths)
4125 {
4126 Plan *plan = create_plan_recurse(root, (Path *) lfirst(lc),
4127 CP_EXACT_TLIST);
4128
4129 custom_plans = lappend(custom_plans, plan);
4130 }
4131
4132 /*
4133 * Sort clauses into the best execution order, although custom-scan
4134 * provider can reorder them again.
4135 */
4136 scan_clauses = order_qual_clauses(root, scan_clauses);
4137
4138 /*
4139 * Invoke custom plan provider to create the Plan node represented by the
4140 * CustomPath.
4141 */
4142 cplan = castNode(CustomScan,
4143 best_path->methods->PlanCustomPath(root,
4144 rel,
4145 best_path,
4146 tlist,
4147 scan_clauses,
4148 custom_plans));
4149
4150 /*
4151 * Copy cost data from Path to Plan; no need to make custom-plan providers
4152 * do this
4153 */
4154 copy_generic_path_info(&cplan->scan.plan, &best_path->path);
4155
4156 /* Likewise, copy the relids that are represented by this custom scan */
4157 cplan->custom_relids = best_path->path.parent->relids;
4158
4159 /*
4160 * Replace any outer-relation variables with nestloop params in the qual
4161 * and custom_exprs expressions. We do this last so that the custom-plan
4162 * provider doesn't have to be involved. (Note that parts of custom_exprs
4163 * could have come from join clauses, so doing this beforehand on the
4164 * scan_clauses wouldn't work.) We assume custom_scan_tlist contains no
4165 * such variables.
4166 */
4167 if (best_path->path.param_info)
4168 {
4169 cplan->scan.plan.qual = (List *)
4170 replace_nestloop_params(root, (Node *) cplan->scan.plan.qual);
4171 cplan->custom_exprs = (List *)
4172 replace_nestloop_params(root, (Node *) cplan->custom_exprs);
4173 }
4174
4175 return cplan;
4176}
4177
4178
4179/*****************************************************************************
4180 *
4181 * JOIN METHODS
4182 *
4183 *****************************************************************************/
4184
4185static NestLoop *
4186create_nestloop_plan(PlannerInfo *root,
4187 NestPath *best_path)
4188{
4189 NestLoop *join_plan;
4190 Plan *outer_plan;
4191 Plan *inner_plan;
4192 Relids outerrelids;
4193 List *tlist = build_path_tlist(root, &best_path->jpath.path);
4194 List *joinrestrictclauses = best_path->jpath.joinrestrictinfo;
4195 List *joinclauses;
4196 List *otherclauses;
4197 List *nestParams;
4198 List *outer_tlist;
4199 bool outer_parallel_safe;
4200 Relids saveOuterRels = root->curOuterRels;
4201 ListCell *lc;
4202
4203 /*
4204 * If the inner path is parameterized by the topmost parent of the outer
4205 * rel rather than the outer rel itself, fix that. (Nothing happens here
4206 * if it is not so parameterized.)
4207 */
4208 best_path->jpath.innerjoinpath =
4209 reparameterize_path_by_child(root,
4210 best_path->jpath.innerjoinpath,
4211 best_path->jpath.outerjoinpath->parent);
4212
4213 /*
4214 * Failure here probably means that reparameterize_path_by_child() is not
4215 * in sync with path_is_reparameterizable_by_child().
4216 */
4217 Assert(best_path->jpath.innerjoinpath != NULL);
4218
4219 /* NestLoop can project, so no need to be picky about child tlists */
4220 outer_plan = create_plan_recurse(root, best_path->jpath.outerjoinpath, 0);
4221
4222 /* For a nestloop, include outer relids in curOuterRels for inner side */
4223 outerrelids = best_path->jpath.outerjoinpath->parent->relids;
4224 root->curOuterRels = bms_union(root->curOuterRels, outerrelids);
4225
4226 inner_plan = create_plan_recurse(root, best_path->jpath.innerjoinpath, 0);
4227
4228 /* Restore curOuterRels */
4229 bms_free(root->curOuterRels);
4230 root->curOuterRels = saveOuterRels;
4231
4232 /* Sort join qual clauses into best execution order */
4233 joinrestrictclauses = order_qual_clauses(root, joinrestrictclauses);
4234
4235 /* Get the join qual clauses (in plain expression form) */
4236 /* Any pseudoconstant clauses are ignored here */
4237 if (IS_OUTER_JOIN(best_path->jpath.jointype))
4238 {
4239 extract_actual_join_clauses(joinrestrictclauses,
4240 best_path->jpath.path.parent->relids,
4241 &joinclauses, &otherclauses);
4242 }
4243 else
4244 {
4245 /* We can treat all clauses alike for an inner join */
4246 joinclauses = extract_actual_clauses(joinrestrictclauses, false);
4247 otherclauses = NIL;
4248 }
4249
4250 /* Replace any outer-relation variables with nestloop params */
4251 if (best_path->jpath.path.param_info)
4252 {
4253 joinclauses = (List *)
4254 replace_nestloop_params(root, (Node *) joinclauses);
4255 otherclauses = (List *)
4256 replace_nestloop_params(root, (Node *) otherclauses);
4257 }
4258
4259 /*
4260 * Identify any nestloop parameters that should be supplied by this join
4261 * node, and remove them from root->curOuterParams.
4262 */
4263 nestParams = identify_current_nestloop_params(root,
4264 outerrelids,
4265 PATH_REQ_OUTER((Path *) best_path));
4266
4267 /*
4268 * While nestloop parameters that are Vars had better be available from
4269 * the outer_plan already, there are edge cases where nestloop parameters
4270 * that are PHVs won't be. In such cases we must add them to the
4271 * outer_plan's tlist, since the executor's NestLoopParam machinery
4272 * requires the params to be simple outer-Var references to that tlist.
4273 * (This is cheating a little bit, because the outer path's required-outer
4274 * relids might not be enough to allow evaluating such a PHV. But in
4275 * practice, if we could have evaluated the PHV at the nestloop node, we
4276 * can do so in the outer plan too.)
4277 */
4278 outer_tlist = outer_plan->targetlist;
4279 outer_parallel_safe = outer_plan->parallel_safe;
4280 foreach(lc, nestParams)
4281 {
4282 NestLoopParam *nlp = (NestLoopParam *) lfirst(lc);
4283 PlaceHolderVar *phv;
4284 TargetEntry *tle;
4285
4286 if (IsA(nlp->paramval, Var))
4287 continue; /* nothing to do for simple Vars */
4288 /* Otherwise it must be a PHV */
4289 phv = castNode(PlaceHolderVar, nlp->paramval);
4290
4291 if (tlist_member((Expr *) phv, outer_tlist))
4292 continue; /* already available */
4293
4294 /*
4295 * It's possible that nestloop parameter PHVs selected to evaluate
4296 * here contain references to surviving root->curOuterParams items
4297 * (that is, they reference values that will be supplied by some
4298 * higher-level nestloop). Those need to be converted to Params now.
4299 * Note: it's safe to do this after the tlist_member() check, because
4300 * equal() won't pay attention to phv->phexpr.
4301 */
4302 phv->phexpr = (Expr *) replace_nestloop_params(root,
4303 (Node *) phv->phexpr);
4304
4305 /* Make a shallow copy of outer_tlist, if we didn't already */
4306 if (outer_tlist == outer_plan->targetlist)
4307 outer_tlist = list_copy(outer_tlist);
4308 /* ... and add the needed expression */
4309 tle = makeTargetEntry((Expr *) copyObject(phv),
4310 list_length(outer_tlist) + 1,
4311 NULL,
4312 true);
4313 outer_tlist = lappend(outer_tlist, tle);
4314 /* ... and track whether tlist is (still) parallel-safe */
4315 if (outer_parallel_safe)
4316 outer_parallel_safe = is_parallel_safe(root, (Node *) phv);
4317 }
4318 if (outer_tlist != outer_plan->targetlist)
4319 outer_plan = change_plan_targetlist(outer_plan, outer_tlist,
4320 outer_parallel_safe);
4321
4322 /* And finally, we can build the join plan node */
4323 join_plan = make_nestloop(tlist,
4324 joinclauses,
4325 otherclauses,
4326 nestParams,
4327 outer_plan,
4328 inner_plan,
4329 best_path->jpath.jointype,
4330 best_path->jpath.inner_unique);
4331
4332 copy_generic_path_info(&join_plan->join.plan, &best_path->jpath.path);
4333
4334 return join_plan;
4335}
4336
4337static MergeJoin *
4338create_mergejoin_plan(PlannerInfo *root,
4339 MergePath *best_path)
4340{
4341 MergeJoin *join_plan;
4342 Plan *outer_plan;
4343 Plan *inner_plan;
4344 List *tlist = build_path_tlist(root, &best_path->jpath.path);
4345 List *joinclauses;
4346 List *otherclauses;
4347 List *mergeclauses;
4348 List *outerpathkeys;
4349 List *innerpathkeys;
4350 int nClauses;
4351 Oid *mergefamilies;
4352 Oid *mergecollations;
4353 bool *mergereversals;
4354 bool *mergenullsfirst;
4355 PathKey *opathkey;
4356 EquivalenceClass *opeclass;
4357 int i;
4358 ListCell *lc;
4359 ListCell *lop;
4360 ListCell *lip;
4361 Path *outer_path = best_path->jpath.outerjoinpath;
4362 Path *inner_path = best_path->jpath.innerjoinpath;
4363
4364 /*
4365 * MergeJoin can project, so we don't have to demand exact tlists from the
4366 * inputs. However, if we're intending to sort an input's result, it's
4367 * best to request a small tlist so we aren't sorting more data than
4368 * necessary.
4369 */
4370 outer_plan = create_plan_recurse(root, best_path->jpath.outerjoinpath,
4371 (best_path->outersortkeys != NIL) ? CP_SMALL_TLIST : 0);
4372
4373 inner_plan = create_plan_recurse(root, best_path->jpath.innerjoinpath,
4374 (best_path->innersortkeys != NIL) ? CP_SMALL_TLIST : 0);
4375
4376 /* Sort join qual clauses into best execution order */
4377 /* NB: do NOT reorder the mergeclauses */
4378 joinclauses = order_qual_clauses(root, best_path->jpath.joinrestrictinfo);
4379
4380 /* Get the join qual clauses (in plain expression form) */
4381 /* Any pseudoconstant clauses are ignored here */
4382 if (IS_OUTER_JOIN(best_path->jpath.jointype))
4383 {
4384 extract_actual_join_clauses(joinclauses,
4385 best_path->jpath.path.parent->relids,
4386 &joinclauses, &otherclauses);
4387 }
4388 else
4389 {
4390 /* We can treat all clauses alike for an inner join */
4391 joinclauses = extract_actual_clauses(joinclauses, false);
4392 otherclauses = NIL;
4393 }
4394
4395 /*
4396 * Remove the mergeclauses from the list of join qual clauses, leaving the
4397 * list of quals that must be checked as qpquals.
4398 */
4399 mergeclauses = get_actual_clauses(best_path->path_mergeclauses);
4400 joinclauses = list_difference(joinclauses, mergeclauses);
4401
4402 /*
4403 * Replace any outer-relation variables with nestloop params. There
4404 * should not be any in the mergeclauses.
4405 */
4406 if (best_path->jpath.path.param_info)
4407 {
4408 joinclauses = (List *)
4409 replace_nestloop_params(root, (Node *) joinclauses);
4410 otherclauses = (List *)
4411 replace_nestloop_params(root, (Node *) otherclauses);
4412 }
4413
4414 /*
4415 * Rearrange mergeclauses, if needed, so that the outer variable is always
4416 * on the left; mark the mergeclause restrictinfos with correct
4417 * outer_is_left status.
4418 */
4419 mergeclauses = get_switched_clauses(best_path->path_mergeclauses,
4420 best_path->jpath.outerjoinpath->parent->relids);
4421
4422 /*
4423 * Create explicit sort nodes for the outer and inner paths if necessary.
4424 */
4425 if (best_path->outersortkeys)
4426 {
4427 Relids outer_relids = outer_path->parent->relids;
4428 Plan *sort_plan;
4429
4430 /*
4431 * We can assert that the outer path is not already ordered
4432 * appropriately for the mergejoin; otherwise, outersortkeys would
4433 * have been set to NIL.
4434 */
4435 Assert(!pathkeys_contained_in(best_path->outersortkeys,
4436 outer_path->pathkeys));
4437
4438 /*
4439 * We choose to use incremental sort if it is enabled and there are
4440 * presorted keys; otherwise we use full sort.
4441 */
4442 if (enable_incremental_sort && best_path->outer_presorted_keys > 0)
4443 {
4444 sort_plan = (Plan *)
4445 make_incrementalsort_from_pathkeys(outer_plan,
4446 best_path->outersortkeys,
4447 outer_relids,
4448 best_path->outer_presorted_keys);
4449
4450 label_incrementalsort_with_costsize(root,
4451 (IncrementalSort *) sort_plan,
4452 best_path->outersortkeys,
4453 -1.0);
4454 }
4455 else
4456 {
4457 sort_plan = (Plan *)
4458 make_sort_from_pathkeys(outer_plan,
4459 best_path->outersortkeys,
4460 outer_relids);
4461
4462 label_sort_with_costsize(root, (Sort *) sort_plan, -1.0);
4463 }
4464
4465 outer_plan = sort_plan;
4466 outerpathkeys = best_path->outersortkeys;
4467 }
4468 else
4469 outerpathkeys = best_path->jpath.outerjoinpath->pathkeys;
4470
4471 if (best_path->innersortkeys)
4472 {
4473 /*
4474 * We do not consider incremental sort for inner path, because
4475 * incremental sort does not support mark/restore.
4476 */
4477
4478 Relids inner_relids = inner_path->parent->relids;
4479 Sort *sort;
4480
4481 /*
4482 * We can assert that the inner path is not already ordered
4483 * appropriately for the mergejoin; otherwise, innersortkeys would
4484 * have been set to NIL.
4485 */
4486 Assert(!pathkeys_contained_in(best_path->innersortkeys,
4487 inner_path->pathkeys));
4488
4489 sort = make_sort_from_pathkeys(inner_plan,
4490 best_path->innersortkeys,
4491 inner_relids);
4492
4493 label_sort_with_costsize(root, sort, -1.0);
4494 inner_plan = (Plan *) sort;
4495 innerpathkeys = best_path->innersortkeys;
4496 }
4497 else
4498 innerpathkeys = best_path->jpath.innerjoinpath->pathkeys;
4499
4500 /*
4501 * If specified, add a materialize node to shield the inner plan from the
4502 * need to handle mark/restore.
4503 */
4504 if (best_path->materialize_inner)
4505 {
4506 Plan *matplan = (Plan *) make_material(inner_plan);
4507
4508 /*
4509 * We assume the materialize will not spill to disk, and therefore
4510 * charge just cpu_operator_cost per tuple. (Keep this estimate in
4511 * sync with final_cost_mergejoin.)
4512 */
4513 copy_plan_costsize(matplan, inner_plan);
4514 matplan->total_cost += cpu_operator_cost * matplan->plan_rows;
4515
4516 inner_plan = matplan;
4517 }
4518
4519 /*
4520 * Compute the opfamily/collation/strategy/nullsfirst arrays needed by the
4521 * executor. The information is in the pathkeys for the two inputs, but
4522 * we need to be careful about the possibility of mergeclauses sharing a
4523 * pathkey, as well as the possibility that the inner pathkeys are not in
4524 * an order matching the mergeclauses.
4525 */
4526 nClauses = list_length(mergeclauses);
4527 Assert(nClauses == list_length(best_path->path_mergeclauses));
4528 mergefamilies = (Oid *) palloc(nClauses * sizeof(Oid));
4529 mergecollations = (Oid *) palloc(nClauses * sizeof(Oid));
4530 mergereversals = (bool *) palloc(nClauses * sizeof(bool));
4531 mergenullsfirst = (bool *) palloc(nClauses * sizeof(bool));
4532
4533 opathkey = NULL;
4534 opeclass = NULL;
4535 lop = list_head(outerpathkeys);
4536 lip = list_head(innerpathkeys);
4537 i = 0;
4538 foreach(lc, best_path->path_mergeclauses)
4539 {
4540 RestrictInfo *rinfo = lfirst_node(RestrictInfo, lc);
4541 EquivalenceClass *oeclass;
4542 EquivalenceClass *ieclass;
4543 PathKey *ipathkey = NULL;
4544 EquivalenceClass *ipeclass = NULL;
4545 bool first_inner_match = false;
4546
4547 /* fetch outer/inner eclass from mergeclause */
4548 if (rinfo->outer_is_left)
4549 {
4550 oeclass = rinfo->left_ec;
4551 ieclass = rinfo->right_ec;
4552 }
4553 else
4554 {
4555 oeclass = rinfo->right_ec;
4556 ieclass = rinfo->left_ec;
4557 }
4558 Assert(oeclass != NULL);
4559 Assert(ieclass != NULL);
4560
4561 /*
4562 * We must identify the pathkey elements associated with this clause
4563 * by matching the eclasses (which should give a unique match, since
4564 * the pathkey lists should be canonical). In typical cases the merge
4565 * clauses are one-to-one with the pathkeys, but when dealing with
4566 * partially redundant query conditions, things are more complicated.
4567 *
4568 * lop and lip reference the first as-yet-unmatched pathkey elements.
4569 * If they're NULL then all pathkey elements have been matched.
4570 *
4571 * The ordering of the outer pathkeys should match the mergeclauses,
4572 * by construction (see find_mergeclauses_for_outer_pathkeys()). There
4573 * could be more than one mergeclause for the same outer pathkey, but
4574 * no pathkey may be entirely skipped over.
4575 */
4576 if (oeclass != opeclass) /* multiple matches are not interesting */
4577 {
4578 /* doesn't match the current opathkey, so must match the next */
4579 if (lop == NULL)
4580 elog(ERROR, "outer pathkeys do not match mergeclauses");
4581 opathkey = (PathKey *) lfirst(lop);
4582 opeclass = opathkey->pk_eclass;
4583 lop = lnext(outerpathkeys, lop);
4584 if (oeclass != opeclass)
4585 elog(ERROR, "outer pathkeys do not match mergeclauses");
4586 }
4587
4588 /*
4589 * The inner pathkeys likewise should not have skipped-over keys, but
4590 * it's possible for a mergeclause to reference some earlier inner
4591 * pathkey if we had redundant pathkeys. For example we might have
4592 * mergeclauses like "o.a = i.x AND o.b = i.y AND o.c = i.x". The
4593 * implied inner ordering is then "ORDER BY x, y, x", but the pathkey
4594 * mechanism drops the second sort by x as redundant, and this code
4595 * must cope.
4596 *
4597 * It's also possible for the implied inner-rel ordering to be like
4598 * "ORDER BY x, y, x DESC". We still drop the second instance of x as
4599 * redundant; but this means that the sort ordering of a redundant
4600 * inner pathkey should not be considered significant. So we must
4601 * detect whether this is the first clause matching an inner pathkey.
4602 */
4603 if (lip)
4604 {
4605 ipathkey = (PathKey *) lfirst(lip);
4606 ipeclass = ipathkey->pk_eclass;
4607 if (ieclass == ipeclass)
4608 {
4609 /* successful first match to this inner pathkey */
4610 lip = lnext(innerpathkeys, lip);
4611 first_inner_match = true;
4612 }
4613 }
4614 if (!first_inner_match)
4615 {
4616 /* redundant clause ... must match something before lip */
4617 ListCell *l2;
4618
4619 foreach(l2, innerpathkeys)
4620 {
4621 if (l2 == lip)
4622 break;
4623 ipathkey = (PathKey *) lfirst(l2);
4624 ipeclass = ipathkey->pk_eclass;
4625 if (ieclass == ipeclass)
4626 break;
4627 }
4628 if (ieclass != ipeclass)
4629 elog(ERROR, "inner pathkeys do not match mergeclauses");
4630 }
4631
4632 /*
4633 * The pathkeys should always match each other as to opfamily and
4634 * collation (which affect equality), but if we're considering a
4635 * redundant inner pathkey, its sort ordering might not match. In
4636 * such cases we may ignore the inner pathkey's sort ordering and use
4637 * the outer's. (In effect, we're lying to the executor about the
4638 * sort direction of this inner column, but it does not matter since
4639 * the run-time row comparisons would only reach this column when
4640 * there's equality for the earlier column containing the same eclass.
4641 * There could be only one value in this column for the range of inner
4642 * rows having a given value in the earlier column, so it does not
4643 * matter which way we imagine this column to be ordered.) But a
4644 * non-redundant inner pathkey had better match outer's ordering too.
4645 */
4646 if (opathkey->pk_opfamily != ipathkey->pk_opfamily ||
4647 opathkey->pk_eclass->ec_collation != ipathkey->pk_eclass->ec_collation)
4648 elog(ERROR, "left and right pathkeys do not match in mergejoin");
4649 if (first_inner_match &&
4650 (opathkey->pk_cmptype != ipathkey->pk_cmptype ||
4651 opathkey->pk_nulls_first != ipathkey->pk_nulls_first))
4652 elog(ERROR, "left and right pathkeys do not match in mergejoin");
4653
4654 /* OK, save info for executor */
4655 mergefamilies[i] = opathkey->pk_opfamily;
4656 mergecollations[i] = opathkey->pk_eclass->ec_collation;
4657 mergereversals[i] = (opathkey->pk_cmptype == COMPARE_GT ? true : false);
4658 mergenullsfirst[i] = opathkey->pk_nulls_first;
4659 i++;
4660 }
4661
4662 /*
4663 * Note: it is not an error if we have additional pathkey elements (i.e.,
4664 * lop or lip isn't NULL here). The input paths might be better-sorted
4665 * than we need for the current mergejoin.
4666 */
4667
4668 /*
4669 * Now we can build the mergejoin node.
4670 */
4671 join_plan = make_mergejoin(tlist,
4672 joinclauses,
4673 otherclauses,
4674 mergeclauses,
4675 mergefamilies,
4676 mergecollations,
4677 mergereversals,
4678 mergenullsfirst,
4679 outer_plan,
4680 inner_plan,
4681 best_path->jpath.jointype,
4682 best_path->jpath.inner_unique,
4683 best_path->skip_mark_restore);
4684
4685 /* Costs of sort and material steps are included in path cost already */
4686 copy_generic_path_info(&join_plan->join.plan, &best_path->jpath.path);
4687
4688 return join_plan;
4689}
4690
4691static HashJoin *
4692create_hashjoin_plan(PlannerInfo *root,
4693 HashPath *best_path)
4694{
4695 HashJoin *join_plan;
4696 Hash *hash_plan;
4697 Plan *outer_plan;
4698 Plan *inner_plan;
4699 List *tlist = build_path_tlist(root, &best_path->jpath.path);
4700 List *joinclauses;
4701 List *otherclauses;
4702 List *hashclauses;
4703 List *hashoperators = NIL;
4704 List *hashcollations = NIL;
4705 List *inner_hashkeys = NIL;
4706 List *outer_hashkeys = NIL;
4707 Oid skewTable = InvalidOid;
4708 AttrNumber skewColumn = InvalidAttrNumber;
4709 bool skewInherit = false;
4710 ListCell *lc;
4711
4712 /*
4713 * HashJoin can project, so we don't have to demand exact tlists from the
4714 * inputs. However, it's best to request a small tlist from the inner
4715 * side, so that we aren't storing more data than necessary. Likewise, if
4716 * we anticipate batching, request a small tlist from the outer side so
4717 * that we don't put extra data in the outer batch files.
4718 */
4719 outer_plan = create_plan_recurse(root, best_path->jpath.outerjoinpath,
4720 (best_path->num_batches > 1) ? CP_SMALL_TLIST : 0);
4721
4722 inner_plan = create_plan_recurse(root, best_path->jpath.innerjoinpath,
4723 CP_SMALL_TLIST);
4724
4725 /* Sort join qual clauses into best execution order */
4726 joinclauses = order_qual_clauses(root, best_path->jpath.joinrestrictinfo);
4727 /* There's no point in sorting the hash clauses ... */
4728
4729 /* Get the join qual clauses (in plain expression form) */
4730 /* Any pseudoconstant clauses are ignored here */
4731 if (IS_OUTER_JOIN(best_path->jpath.jointype))
4732 {
4733 extract_actual_join_clauses(joinclauses,
4734 best_path->jpath.path.parent->relids,
4735 &joinclauses, &otherclauses);
4736 }
4737 else
4738 {
4739 /* We can treat all clauses alike for an inner join */
4740 joinclauses = extract_actual_clauses(joinclauses, false);
4741 otherclauses = NIL;
4742 }
4743
4744 /*
4745 * Remove the hashclauses from the list of join qual clauses, leaving the
4746 * list of quals that must be checked as qpquals.
4747 */
4748 hashclauses = get_actual_clauses(best_path->path_hashclauses);
4749 joinclauses = list_difference(joinclauses, hashclauses);
4750
4751 /*
4752 * Replace any outer-relation variables with nestloop params. There
4753 * should not be any in the hashclauses.
4754 */
4755 if (best_path->jpath.path.param_info)
4756 {
4757 joinclauses = (List *)
4758 replace_nestloop_params(root, (Node *) joinclauses);
4759 otherclauses = (List *)
4760 replace_nestloop_params(root, (Node *) otherclauses);
4761 }
4762
4763 /*
4764 * Rearrange hashclauses, if needed, so that the outer variable is always
4765 * on the left.
4766 */
4767 hashclauses = get_switched_clauses(best_path->path_hashclauses,
4768 best_path->jpath.outerjoinpath->parent->relids);
4769
4770 /*
4771 * If there is a single join clause and we can identify the outer variable
4772 * as a simple column reference, supply its identity for possible use in
4773 * skew optimization. (Note: in principle we could do skew optimization
4774 * with multiple join clauses, but we'd have to be able to determine the
4775 * most common combinations of outer values, which we don't currently have
4776 * enough stats for.)
4777 */
4778 if (list_length(hashclauses) == 1)
4779 {
4780 OpExpr *clause = (OpExpr *) linitial(hashclauses);
4781 Node *node;
4782
4783 Assert(is_opclause(clause));
4784 node = (Node *) linitial(clause->args);
4785 if (IsA(node, RelabelType))
4786 node = (Node *) ((RelabelType *) node)->arg;
4787 if (IsA(node, Var))
4788 {
4789 Var *var = (Var *) node;
4790 RangeTblEntry *rte;
4791
4792 rte = root->simple_rte_array[var->varno];
4793 if (rte->rtekind == RTE_RELATION)
4794 {
4795 skewTable = rte->relid;
4796 skewColumn = var->varattno;
4797 skewInherit = rte->inh;
4798 }
4799 }
4800 }
4801
4802 /*
4803 * Collect hash related information. The hashed expressions are
4804 * deconstructed into outer/inner expressions, so they can be computed
4805 * separately (inner expressions are used to build the hashtable via Hash,
4806 * outer expressions to perform lookups of tuples from HashJoin's outer
4807 * plan in the hashtable). Also collect operator information necessary to
4808 * build the hashtable.
4809 */
4810 foreach(lc, hashclauses)
4811 {
4812 OpExpr *hclause = lfirst_node(OpExpr, lc);
4813
4814 hashoperators = lappend_oid(hashoperators, hclause->opno);
4815 hashcollations = lappend_oid(hashcollations, hclause->inputcollid);
4816 outer_hashkeys = lappend(outer_hashkeys, linitial(hclause->args));
4817 inner_hashkeys = lappend(inner_hashkeys, lsecond(hclause->args));
4818 }
4819
4820 /*
4821 * Build the hash node and hash join node.
4822 */
4823 hash_plan = make_hash(inner_plan,
4824 inner_hashkeys,
4825 skewTable,
4826 skewColumn,
4827 skewInherit);
4828
4829 /*
4830 * Set Hash node's startup & total costs equal to total cost of input
4831 * plan; this only affects EXPLAIN display not decisions.
4832 */
4833 copy_plan_costsize(&hash_plan->plan, inner_plan);
4834 hash_plan->plan.startup_cost = hash_plan->plan.total_cost;
4835
4836 /*
4837 * If parallel-aware, the executor will also need an estimate of the total
4838 * number of rows expected from all participants so that it can size the
4839 * shared hash table.
4840 */
4841 if (best_path->jpath.path.parallel_aware)
4842 {
4843 hash_plan->plan.parallel_aware = true;
4844 hash_plan->rows_total = best_path->inner_rows_total;
4845 }
4846
4847 join_plan = make_hashjoin(tlist,
4848 joinclauses,
4849 otherclauses,
4850 hashclauses,
4851 hashoperators,
4852 hashcollations,
4853 outer_hashkeys,
4854 outer_plan,
4855 (Plan *) hash_plan,
4856 best_path->jpath.jointype,
4857 best_path->jpath.inner_unique);
4858
4859 copy_generic_path_info(&join_plan->join.plan, &best_path->jpath.path);
4860
4861 return join_plan;
4862}
4863
4864
4865/*****************************************************************************
4866 *
4867 * SUPPORTING ROUTINES
4868 *
4869 *****************************************************************************/
4870
4871/*
4872 * replace_nestloop_params
4873 * Replace outer-relation Vars and PlaceHolderVars in the given expression
4874 * with nestloop Params
4875 *
4876 * All Vars and PlaceHolderVars belonging to the relation(s) identified by
4877 * root->curOuterRels are replaced by Params, and entries are added to
4878 * root->curOuterParams if not already present.
4879 */
4880static Node *
4881replace_nestloop_params(PlannerInfo *root, Node *expr)
4882{
4883 /* No setup needed for tree walk, so away we go */
4884 return replace_nestloop_params_mutator(expr, root);
4885}
4886
4887static Node *
4888replace_nestloop_params_mutator(Node *node, PlannerInfo *root)
4889{
4890 if (node == NULL)
4891 return NULL;
4892 if (IsA(node, Var))
4893 {
4894 Var *var = (Var *) node;
4895
4896 /* Upper-level Vars should be long gone at this point */
4897 Assert(var->varlevelsup == 0);
4898 /* If not to be replaced, we can just return the Var unmodified */
4899 if (IS_SPECIAL_VARNO(var->varno) ||
4900 !bms_is_member(var->varno, root->curOuterRels))
4901 return node;
4902 /* Replace the Var with a nestloop Param */
4903 return (Node *) replace_nestloop_param_var(root, var);
4904 }
4905 if (IsA(node, PlaceHolderVar))
4906 {
4907 PlaceHolderVar *phv = (PlaceHolderVar *) node;
4908
4909 /* Upper-level PlaceHolderVars should be long gone at this point */
4910 Assert(phv->phlevelsup == 0);
4911
4912 /* Check whether we need to replace the PHV */
4913 if (!bms_is_subset(find_placeholder_info(root, phv)->ph_eval_at,
4914 root->curOuterRels))
4915 {
4916 /*
4917 * We can't replace the whole PHV, but we might still need to
4918 * replace Vars or PHVs within its expression, in case it ends up
4919 * actually getting evaluated here. (It might get evaluated in
4920 * this plan node, or some child node; in the latter case we don't
4921 * really need to process the expression here, but we haven't got
4922 * enough info to tell if that's the case.) Flat-copy the PHV
4923 * node and then recurse on its expression.
4924 *
4925 * Note that after doing this, we might have different
4926 * representations of the contents of the same PHV in different
4927 * parts of the plan tree. This is OK because equal() will just
4928 * match on phid/phlevelsup, so setrefs.c will still recognize an
4929 * upper-level reference to a lower-level copy of the same PHV.
4930 */
4931 PlaceHolderVar *newphv = makeNode(PlaceHolderVar);
4932
4933 memcpy(newphv, phv, sizeof(PlaceHolderVar));
4934 newphv->phexpr = (Expr *)
4935 replace_nestloop_params_mutator((Node *) phv->phexpr,
4936 root);
4937 return (Node *) newphv;
4938 }
4939 /* Replace the PlaceHolderVar with a nestloop Param */
4940 return (Node *) replace_nestloop_param_placeholdervar(root, phv);
4941 }
4942 return expression_tree_mutator(node, replace_nestloop_params_mutator, root);
4943}
4944
4945/*
4946 * fix_indexqual_references
4947 * Adjust indexqual clauses to the form the executor's indexqual
4948 * machinery needs.
4949 *
4950 * We have three tasks here:
4951 * * Select the actual qual clauses out of the input IndexClause list,
4952 * and remove RestrictInfo nodes from the qual clauses.
4953 * * Replace any outer-relation Var or PHV nodes with nestloop Params.
4954 * (XXX eventually, that responsibility should go elsewhere?)
4955 * * Index keys must be represented by Var nodes with varattno set to the
4956 * index's attribute number, not the attribute number in the original rel.
4957 *
4958 * *stripped_indexquals_p receives a list of the actual qual clauses.
4959 *
4960 * *fixed_indexquals_p receives a list of the adjusted quals. This is a copy
4961 * that shares no substructure with the original; this is needed in case there
4962 * are subplans in it (we need two separate copies of the subplan tree, or
4963 * things will go awry).
4964 */
4965static void
4966fix_indexqual_references(PlannerInfo *root, IndexPath *index_path,
4967 List **stripped_indexquals_p, List **fixed_indexquals_p)
4968{
4969 IndexOptInfo *index = index_path->indexinfo;
4970 List *stripped_indexquals;
4971 List *fixed_indexquals;
4972 ListCell *lc;
4973
4974 stripped_indexquals = fixed_indexquals = NIL;
4975
4976 foreach(lc, index_path->indexclauses)
4977 {
4978 IndexClause *iclause = lfirst_node(IndexClause, lc);
4979 int indexcol = iclause->indexcol;
4980 ListCell *lc2;
4981
4982 foreach(lc2, iclause->indexquals)
4983 {
4984 RestrictInfo *rinfo = lfirst_node(RestrictInfo, lc2);
4985 Node *clause = (Node *) rinfo->clause;
4986
4987 stripped_indexquals = lappend(stripped_indexquals, clause);
4988 clause = fix_indexqual_clause(root, index, indexcol,
4989 clause, iclause->indexcols);
4990 fixed_indexquals = lappend(fixed_indexquals, clause);
4991 }
4992 }
4993
4994 *stripped_indexquals_p = stripped_indexquals;
4995 *fixed_indexquals_p = fixed_indexquals;
4996}
4997
4998/*
4999 * fix_indexorderby_references
5000 * Adjust indexorderby clauses to the form the executor's index
5001 * machinery needs.
5002 *
5003 * This is a simplified version of fix_indexqual_references. The input is
5004 * bare clauses and a separate indexcol list, instead of IndexClauses.
5005 */
5006static List *
5007fix_indexorderby_references(PlannerInfo *root, IndexPath *index_path)
5008{
5009 IndexOptInfo *index = index_path->indexinfo;
5010 List *fixed_indexorderbys;
5011 ListCell *lcc,
5012 *lci;
5013
5014 fixed_indexorderbys = NIL;
5015
5016 forboth(lcc, index_path->indexorderbys, lci, index_path->indexorderbycols)
5017 {
5018 Node *clause = (Node *) lfirst(lcc);
5019 int indexcol = lfirst_int(lci);
5020
5021 clause = fix_indexqual_clause(root, index, indexcol, clause, NIL);
5022 fixed_indexorderbys = lappend(fixed_indexorderbys, clause);
5023 }
5024
5025 return fixed_indexorderbys;
5026}
5027
5028/*
5029 * fix_indexqual_clause
5030 * Convert a single indexqual clause to the form needed by the executor.
5031 *
5032 * We replace nestloop params here, and replace the index key variables
5033 * or expressions by index Var nodes.
5034 */
5035static Node *
5036fix_indexqual_clause(PlannerInfo *root, IndexOptInfo *index, int indexcol,
5037 Node *clause, List *indexcolnos)
5038{
5039 /*
5040 * Replace any outer-relation variables with nestloop params.
5041 *
5042 * This also makes a copy of the clause, so it's safe to modify it
5043 * in-place below.
5044 */
5045 clause = replace_nestloop_params(root, clause);
5046
5047 if (IsA(clause, OpExpr))
5048 {
5049 OpExpr *op = (OpExpr *) clause;
5050
5051 /* Replace the indexkey expression with an index Var. */
5052 linitial(op->args) = fix_indexqual_operand(linitial(op->args),
5053 index,
5054 indexcol);
5055 }
5056 else if (IsA(clause, RowCompareExpr))
5057 {
5058 RowCompareExpr *rc = (RowCompareExpr *) clause;
5059 ListCell *lca,
5060 *lcai;
5061
5062 /* Replace the indexkey expressions with index Vars. */
5063 Assert(list_length(rc->largs) == list_length(indexcolnos));
5064 forboth(lca, rc->largs, lcai, indexcolnos)
5065 {
5066 lfirst(lca) = fix_indexqual_operand(lfirst(lca),
5067 index,
5068 lfirst_int(lcai));
5069 }
5070 }
5071 else if (IsA(clause, ScalarArrayOpExpr))
5072 {
5073 ScalarArrayOpExpr *saop = (ScalarArrayOpExpr *) clause;
5074
5075 /* Replace the indexkey expression with an index Var. */
5076 linitial(saop->args) = fix_indexqual_operand(linitial(saop->args),
5077 index,
5078 indexcol);
5079 }
5080 else if (IsA(clause, NullTest))
5081 {
5082 NullTest *nt = (NullTest *) clause;
5083
5084 /* Replace the indexkey expression with an index Var. */
5085 nt->arg = (Expr *) fix_indexqual_operand((Node *) nt->arg,
5086 index,
5087 indexcol);
5088 }
5089 else
5090 elog(ERROR, "unsupported indexqual type: %d",
5091 (int) nodeTag(clause));
5092
5093 return clause;
5094}
5095
5096/*
5097 * fix_indexqual_operand
5098 * Convert an indexqual expression to a Var referencing the index column.
5099 *
5100 * We represent index keys by Var nodes having varno == INDEX_VAR and varattno
5101 * equal to the index's attribute number (index column position).
5102 *
5103 * Most of the code here is just for sanity cross-checking that the given
5104 * expression actually matches the index column it's claimed to. It should
5105 * match the logic in match_index_to_operand().
5106 */
5107static Node *
5108fix_indexqual_operand(Node *node, IndexOptInfo *index, int indexcol)
5109{
5110 Var *result;
5111 int pos;
5112 ListCell *indexpr_item;
5113
5114 Assert(indexcol >= 0 && indexcol < index->ncolumns);
5115
5116 /*
5117 * Remove any PlaceHolderVar wrapping of the indexkey
5118 */
5119 node = strip_phvs_in_index_operand(node);
5120
5121 /*
5122 * Remove any binary-compatible relabeling of the indexkey
5123 */
5124 while (IsA(node, RelabelType))
5125 node = (Node *) ((RelabelType *) node)->arg;
5126
5127 if (index->indexkeys[indexcol] != 0)
5128 {
5129 /* It's a simple index column */
5130 if (IsA(node, Var) &&
5131 ((Var *) node)->varno == index->rel->relid &&
5132 ((Var *) node)->varattno == index->indexkeys[indexcol])
5133 {
5134 result = (Var *) copyObject(node);
5135 result->varno = INDEX_VAR;
5136 result->varattno = indexcol + 1;
5137 return (Node *) result;
5138 }
5139 else
5140 elog(ERROR, "index key does not match expected index column");
5141 }
5142
5143 /* It's an index expression, so find and cross-check the expression */
5144 indexpr_item = list_head(index->indexprs);
5145 for (pos = 0; pos < index->ncolumns; pos++)
5146 {
5147 if (index->indexkeys[pos] == 0)
5148 {
5149 if (indexpr_item == NULL)
5150 elog(ERROR, "too few entries in indexprs list");
5151 if (pos == indexcol)
5152 {
5153 Node *indexkey;
5154
5155 indexkey = (Node *) lfirst(indexpr_item);
5156 if (indexkey && IsA(indexkey, RelabelType))
5157 indexkey = (Node *) ((RelabelType *) indexkey)->arg;
5158 if (equal(node, indexkey))
5159 {
5160 result = makeVar(INDEX_VAR, indexcol + 1,
5161 exprType(lfirst(indexpr_item)), -1,
5162 exprCollation(lfirst(indexpr_item)),
5163 0);
5164 return (Node *) result;
5165 }
5166 else
5167 elog(ERROR, "index key does not match expected index column");
5168 }
5169 indexpr_item = lnext(index->indexprs, indexpr_item);
5170 }
5171 }
5172
5173 /* Oops... */
5174 elog(ERROR, "index key does not match expected index column");
5175 return NULL; /* keep compiler quiet */
5176}
5177
5178/*
5179 * get_switched_clauses
5180 * Given a list of merge or hash joinclauses (as RestrictInfo nodes),
5181 * extract the bare clauses, and rearrange the elements within the
5182 * clauses, if needed, so the outer join variable is on the left and
5183 * the inner is on the right. The original clause data structure is not
5184 * touched; a modified list is returned. We do, however, set the transient
5185 * outer_is_left field in each RestrictInfo to show which side was which.
5186 */
5187static List *
5188get_switched_clauses(List *clauses, Relids outerrelids)
5189{
5190 List *t_list = NIL;
5191 ListCell *l;
5192
5193 foreach(l, clauses)
5194 {
5195 RestrictInfo *restrictinfo = (RestrictInfo *) lfirst(l);
5196 OpExpr *clause = (OpExpr *) restrictinfo->clause;
5197
5198 Assert(is_opclause(clause));
5199 if (bms_is_subset(restrictinfo->right_relids, outerrelids))
5200 {
5201 /*
5202 * Duplicate just enough of the structure to allow commuting the
5203 * clause without changing the original list. Could use
5204 * copyObject, but a complete deep copy is overkill.
5205 */
5206 OpExpr *temp = makeNode(OpExpr);
5207
5208 temp->opno = clause->opno;
5209 temp->opfuncid = InvalidOid;
5210 temp->opresulttype = clause->opresulttype;
5211 temp->opretset = clause->opretset;
5212 temp->opcollid = clause->opcollid;
5213 temp->inputcollid = clause->inputcollid;
5214 temp->args = list_copy(clause->args);
5215 temp->location = clause->location;
5216 /* Commute it --- note this modifies the temp node in-place. */
5217 CommuteOpExpr(temp);
5218 t_list = lappend(t_list, temp);
5219 restrictinfo->outer_is_left = false;
5220 }
5221 else
5222 {
5223 Assert(bms_is_subset(restrictinfo->left_relids, outerrelids));
5224 t_list = lappend(t_list, clause);
5225 restrictinfo->outer_is_left = true;
5226 }
5227 }
5228 return t_list;
5229}
5230
5231/*
5232 * order_qual_clauses
5233 * Given a list of qual clauses that will all be evaluated at the same
5234 * plan node, sort the list into the order we want to check the quals
5235 * in at runtime.
5236 *
5237 * When security barrier quals are used in the query, we may have quals with
5238 * different security levels in the list. Quals of lower security_level
5239 * must go before quals of higher security_level, except that we can grant
5240 * exceptions to move up quals that are leakproof. When security level
5241 * doesn't force the decision, we prefer to order clauses by estimated
5242 * execution cost, cheapest first.
5243 *
5244 * Ideally the order should be driven by a combination of execution cost and
5245 * selectivity, but it's not immediately clear how to account for both,
5246 * and given the uncertainty of the estimates the reliability of the decisions
5247 * would be doubtful anyway. So we just order by security level then
5248 * estimated per-tuple cost, being careful not to change the order when
5249 * (as is often the case) the estimates are identical.
5250 *
5251 * Although this will work on either bare clauses or RestrictInfos, it's
5252 * much faster to apply it to RestrictInfos, since it can re-use cost
5253 * information that is cached in RestrictInfos. XXX in the bare-clause
5254 * case, we are also not able to apply security considerations. That is
5255 * all right for the moment, because the bare-clause case doesn't occur
5256 * anywhere that barrier quals could be present, but it would be better to
5257 * get rid of it.
5258 *
5259 * Note: some callers pass lists that contain entries that will later be
5260 * removed; this is the easiest way to let this routine see RestrictInfos
5261 * instead of bare clauses. This is another reason why trying to consider
5262 * selectivity in the ordering would likely do the wrong thing.
5263 */
5264static List *
5265order_qual_clauses(PlannerInfo *root, List *clauses)
5266{
5267 typedef struct
5268 {
5269 Node *clause;
5270 Cost cost;
5271 Index security_level;
5272 } QualItem;
5273 int nitems = list_length(clauses);
5274 QualItem *items;
5275 ListCell *lc;
5276 int i;
5277 List *result;
5278
5279 /* No need to work hard for 0 or 1 clause */
5280 if (nitems <= 1)
5281 return clauses;
5282
5283 /*
5284 * Collect the items and costs into an array. This is to avoid repeated
5285 * cost_qual_eval work if the inputs aren't RestrictInfos.
5286 */
5287 items = (QualItem *) palloc(nitems * sizeof(QualItem));
5288 i = 0;
5289 foreach(lc, clauses)
5290 {
5291 Node *clause = (Node *) lfirst(lc);
5292 QualCost qcost;
5293
5294 cost_qual_eval_node(&qcost, clause, root);
5295 items[i].clause = clause;
5296 items[i].cost = qcost.per_tuple;
5297 if (IsA(clause, RestrictInfo))
5298 {
5299 RestrictInfo *rinfo = (RestrictInfo *) clause;
5300
5301 /*
5302 * If a clause is leakproof, it doesn't have to be constrained by
5303 * its nominal security level. If it's also reasonably cheap
5304 * (here defined as 10X cpu_operator_cost), pretend it has
5305 * security_level 0, which will allow it to go in front of
5306 * more-expensive quals of lower security levels. Of course, that
5307 * will also force it to go in front of cheaper quals of its own
5308 * security level, which is not so great, but we can alleviate
5309 * that risk by applying the cost limit cutoff.
5310 */
5311 if (rinfo->leakproof && items[i].cost < 10 * cpu_operator_cost)
5312 items[i].security_level = 0;
5313 else
5314 items[i].security_level = rinfo->security_level;
5315 }
5316 else
5317 items[i].security_level = 0;
5318 i++;
5319 }
5320
5321 /*
5322 * Sort. We don't use qsort() because it's not guaranteed stable for
5323 * equal keys. The expected number of entries is small enough that a
5324 * simple insertion sort should be good enough.
5325 */
5326 for (i = 1; i < nitems; i++)
5327 {
5328 QualItem newitem = items[i];
5329 int j;
5330
5331 /* insert newitem into the already-sorted subarray */
5332 for (j = i; j > 0; j--)
5333 {
5334 QualItem *olditem = &items[j - 1];
5335
5336 if (newitem.security_level > olditem->security_level ||
5337 (newitem.security_level == olditem->security_level &&
5338 newitem.cost >= olditem->cost))
5339 break;
5340 items[j] = *olditem;
5341 }
5342 items[j] = newitem;
5343 }
5344
5345 /* Convert back to a list */
5346 result = NIL;
5347 for (i = 0; i < nitems; i++)
5348 result = lappend(result, items[i].clause);
5349
5350 return result;
5351}
5352
5353/*
5354 * Copy cost and size info from a Path node to the Plan node created from it.
5355 * The executor usually won't use this info, but it's needed by EXPLAIN.
5356 * Also copy the parallel-related flags, which the executor *will* use.
5357 */
5358static void
5359copy_generic_path_info(Plan *dest, Path *src)
5360{
5361 dest->disabled_nodes = src->disabled_nodes;
5362 dest->startup_cost = src->startup_cost;
5363 dest->total_cost = src->total_cost;
5364 dest->plan_rows = src->rows;
5365 dest->plan_width = src->pathtarget->width;
5366 dest->parallel_aware = src->parallel_aware;
5367 dest->parallel_safe = src->parallel_safe;
5368}
5369
5370/*
5371 * Copy cost and size info from a lower plan node to an inserted node.
5372 * (Most callers alter the info after copying it.)
5373 */
5374static void
5375copy_plan_costsize(Plan *dest, Plan *src)
5376{
5377 dest->disabled_nodes = src->disabled_nodes;
5378 dest->startup_cost = src->startup_cost;
5379 dest->total_cost = src->total_cost;
5380 dest->plan_rows = src->plan_rows;
5381 dest->plan_width = src->plan_width;
5382 /* Assume the inserted node is not parallel-aware. */
5383 dest->parallel_aware = false;
5384 /* Assume the inserted node is parallel-safe, if child plan is. */
5385 dest->parallel_safe = src->parallel_safe;
5386}
5387
5388/*
5389 * Some places in this file build Sort nodes that don't have a directly
5390 * corresponding Path node. The cost of the sort is, or should have been,
5391 * included in the cost of the Path node we're working from, but since it's
5392 * not split out, we have to re-figure it using cost_sort(). This is just
5393 * to label the Sort node nicely for EXPLAIN.
5394 *
5395 * limit_tuples is as for cost_sort (in particular, pass -1 if no limit)
5396 */
5397static void
5398label_sort_with_costsize(PlannerInfo *root, Sort *plan, double limit_tuples)
5399{
5400 Plan *lefttree = plan->plan.lefttree;
5401 Path sort_path; /* dummy for result of cost_sort */
5402
5403 Assert(IsA(plan, Sort));
5404
5405 cost_sort(&sort_path, root, NIL,
5406 plan->plan.disabled_nodes,
5407 lefttree->total_cost,
5408 lefttree->plan_rows,
5409 lefttree->plan_width,
5410 0.0,
5411 work_mem,
5412 limit_tuples);
5413 plan->plan.startup_cost = sort_path.startup_cost;
5414 plan->plan.total_cost = sort_path.total_cost;
5415 plan->plan.plan_rows = lefttree->plan_rows;
5416 plan->plan.plan_width = lefttree->plan_width;
5417 plan->plan.parallel_aware = false;
5418 plan->plan.parallel_safe = lefttree->parallel_safe;
5419}
5420
5421/*
5422 * Same as label_sort_with_costsize, but labels the IncrementalSort node
5423 * instead.
5424 */
5425static void
5426label_incrementalsort_with_costsize(PlannerInfo *root, IncrementalSort *plan,
5427 List *pathkeys, double limit_tuples)
5428{
5429 Plan *lefttree = plan->sort.plan.lefttree;
5430 Path sort_path; /* dummy for result of cost_incremental_sort */
5431
5432 Assert(IsA(plan, IncrementalSort));
5433
5434 cost_incremental_sort(&sort_path, root, pathkeys,
5435 plan->nPresortedCols,
5436 plan->sort.plan.disabled_nodes,
5437 lefttree->startup_cost,
5438 lefttree->total_cost,
5439 lefttree->plan_rows,
5440 lefttree->plan_width,
5441 0.0,
5442 work_mem,
5443 limit_tuples);
5444 plan->sort.plan.startup_cost = sort_path.startup_cost;
5445 plan->sort.plan.total_cost = sort_path.total_cost;
5446 plan->sort.plan.plan_rows = lefttree->plan_rows;
5447 plan->sort.plan.plan_width = lefttree->plan_width;
5448 plan->sort.plan.parallel_aware = false;
5449 plan->sort.plan.parallel_safe = lefttree->parallel_safe;
5450}
5451
5452/*
5453 * bitmap_subplan_mark_shared
5454 * Set isshared flag in bitmap subplan so that it will be created in
5455 * shared memory.
5456 */
5457static void
5458bitmap_subplan_mark_shared(Plan *plan)
5459{
5460 if (IsA(plan, BitmapAnd))
5461 bitmap_subplan_mark_shared(linitial(((BitmapAnd *) plan)->bitmapplans));
5462 else if (IsA(plan, BitmapOr))
5463 {
5464 ((BitmapOr *) plan)->isshared = true;
5465 bitmap_subplan_mark_shared(linitial(((BitmapOr *) plan)->bitmapplans));
5466 }
5467 else if (IsA(plan, BitmapIndexScan))
5468 ((BitmapIndexScan *) plan)->isshared = true;
5469 else
5470 elog(ERROR, "unrecognized node type: %d", nodeTag(plan));
5471}
5472
5473/*****************************************************************************
5474 *
5475 * PLAN NODE BUILDING ROUTINES
5476 *
5477 * In general, these functions are not passed the original Path and therefore
5478 * leave it to the caller to fill in the cost/width fields from the Path,
5479 * typically by calling copy_generic_path_info(). This convention is
5480 * somewhat historical, but it does support a few places above where we build
5481 * a plan node without having an exactly corresponding Path node. Under no
5482 * circumstances should one of these functions do its own cost calculations,
5483 * as that would be redundant with calculations done while building Paths.
5484 *
5485 *****************************************************************************/
5486
5487static SeqScan *
5488make_seqscan(List *qptlist,
5489 List *qpqual,
5490 Index scanrelid)
5491{
5492 SeqScan *node = makeNode(SeqScan);
5493 Plan *plan = &node->scan.plan;
5494
5495 plan->targetlist = qptlist;
5496 plan->qual = qpqual;
5497 plan->lefttree = NULL;
5498 plan->righttree = NULL;
5499 node->scan.scanrelid = scanrelid;
5500
5501 return node;
5502}
5503
5504static SampleScan *
5505make_samplescan(List *qptlist,
5506 List *qpqual,
5507 Index scanrelid,
5508 TableSampleClause *tsc)
5509{
5510 SampleScan *node = makeNode(SampleScan);
5511 Plan *plan = &node->scan.plan;
5512
5513 plan->targetlist = qptlist;
5514 plan->qual = qpqual;
5515 plan->lefttree = NULL;
5516 plan->righttree = NULL;
5517 node->scan.scanrelid = scanrelid;
5518 node->tablesample = tsc;
5519
5520 return node;
5521}
5522
5523static IndexScan *
5524make_indexscan(List *qptlist,
5525 List *qpqual,
5526 Index scanrelid,
5527 Oid indexid,
5528 List *indexqual,
5529 List *indexqualorig,
5530 List *indexorderby,
5531 List *indexorderbyorig,
5532 List *indexorderbyops,
5533 ScanDirection indexscandir)
5534{
5535 IndexScan *node = makeNode(IndexScan);
5536 Plan *plan = &node->scan.plan;
5537
5538 plan->targetlist = qptlist;
5539 plan->qual = qpqual;
5540 plan->lefttree = NULL;
5541 plan->righttree = NULL;
5542 node->scan.scanrelid = scanrelid;
5543 node->indexid = indexid;
5544 node->indexqual = indexqual;
5545 node->indexqualorig = indexqualorig;
5546 node->indexorderby = indexorderby;
5547 node->indexorderbyorig = indexorderbyorig;
5548 node->indexorderbyops = indexorderbyops;
5549 node->indexorderdir = indexscandir;
5550
5551 return node;
5552}
5553
5554static IndexOnlyScan *
5555make_indexonlyscan(List *qptlist,
5556 List *qpqual,
5557 Index scanrelid,
5558 Oid indexid,
5559 List *indexqual,
5560 List *recheckqual,
5561 List *indexorderby,
5562 List *indextlist,
5563 ScanDirection indexscandir)
5564{
5565 IndexOnlyScan *node = makeNode(IndexOnlyScan);
5566 Plan *plan = &node->scan.plan;
5567
5568 plan->targetlist = qptlist;
5569 plan->qual = qpqual;
5570 plan->lefttree = NULL;
5571 plan->righttree = NULL;
5572 node->scan.scanrelid = scanrelid;
5573 node->indexid = indexid;
5574 node->indexqual = indexqual;
5575 node->recheckqual = recheckqual;
5576 node->indexorderby = indexorderby;
5577 node->indextlist = indextlist;
5578 node->indexorderdir = indexscandir;
5579
5580 return node;
5581}
5582
5583static BitmapIndexScan *
5584make_bitmap_indexscan(Index scanrelid,
5585 Oid indexid,
5586 List *indexqual,
5587 List *indexqualorig)
5588{
5589 BitmapIndexScan *node = makeNode(BitmapIndexScan);
5590 Plan *plan = &node->scan.plan;
5591
5592 plan->targetlist = NIL; /* not used */
5593 plan->qual = NIL; /* not used */
5594 plan->lefttree = NULL;
5595 plan->righttree = NULL;
5596 node->scan.scanrelid = scanrelid;
5597 node->indexid = indexid;
5598 node->indexqual = indexqual;
5599 node->indexqualorig = indexqualorig;
5600
5601 return node;
5602}
5603
5604static BitmapHeapScan *
5605make_bitmap_heapscan(List *qptlist,
5606 List *qpqual,
5607 Plan *lefttree,
5608 List *bitmapqualorig,
5609 Index scanrelid)
5610{
5611 BitmapHeapScan *node = makeNode(BitmapHeapScan);
5612 Plan *plan = &node->scan.plan;
5613
5614 plan->targetlist = qptlist;
5615 plan->qual = qpqual;
5616 plan->lefttree = lefttree;
5617 plan->righttree = NULL;
5618 node->scan.scanrelid = scanrelid;
5619 node->bitmapqualorig = bitmapqualorig;
5620
5621 return node;
5622}
5623
5624static TidScan *
5625make_tidscan(List *qptlist,
5626 List *qpqual,
5627 Index scanrelid,
5628 List *tidquals)
5629{
5630 TidScan *node = makeNode(TidScan);
5631 Plan *plan = &node->scan.plan;
5632
5633 plan->targetlist = qptlist;
5634 plan->qual = qpqual;
5635 plan->lefttree = NULL;
5636 plan->righttree = NULL;
5637 node->scan.scanrelid = scanrelid;
5638 node->tidquals = tidquals;
5639
5640 return node;
5641}
5642
5643static TidRangeScan *
5644make_tidrangescan(List *qptlist,
5645 List *qpqual,
5646 Index scanrelid,
5647 List *tidrangequals)
5648{
5649 TidRangeScan *node = makeNode(TidRangeScan);
5650 Plan *plan = &node->scan.plan;
5651
5652 plan->targetlist = qptlist;
5653 plan->qual = qpqual;
5654 plan->lefttree = NULL;
5655 plan->righttree = NULL;
5656 node->scan.scanrelid = scanrelid;
5657 node->tidrangequals = tidrangequals;
5658
5659 return node;
5660}
5661
5662static SubqueryScan *
5663make_subqueryscan(List *qptlist,
5664 List *qpqual,
5665 Index scanrelid,
5666 Plan *subplan)
5667{
5668 SubqueryScan *node = makeNode(SubqueryScan);
5669 Plan *plan = &node->scan.plan;
5670
5671 plan->targetlist = qptlist;
5672 plan->qual = qpqual;
5673 plan->lefttree = NULL;
5674 plan->righttree = NULL;
5675 node->scan.scanrelid = scanrelid;
5676 node->subplan = subplan;
5677 node->scanstatus = SUBQUERY_SCAN_UNKNOWN;
5678
5679 return node;
5680}
5681
5682static FunctionScan *
5683make_functionscan(List *qptlist,
5684 List *qpqual,
5685 Index scanrelid,
5686 List *functions,
5687 bool funcordinality)
5688{
5689 FunctionScan *node = makeNode(FunctionScan);
5690 Plan *plan = &node->scan.plan;
5691
5692 plan->targetlist = qptlist;
5693 plan->qual = qpqual;
5694 plan->lefttree = NULL;
5695 plan->righttree = NULL;
5696 node->scan.scanrelid = scanrelid;
5697 node->functions = functions;
5698 node->funcordinality = funcordinality;
5699
5700 return node;
5701}
5702
5703static TableFuncScan *
5704make_tablefuncscan(List *qptlist,
5705 List *qpqual,
5706 Index scanrelid,
5707 TableFunc *tablefunc)
5708{
5709 TableFuncScan *node = makeNode(TableFuncScan);
5710 Plan *plan = &node->scan.plan;
5711
5712 plan->targetlist = qptlist;
5713 plan->qual = qpqual;
5714 plan->lefttree = NULL;
5715 plan->righttree = NULL;
5716 node->scan.scanrelid = scanrelid;
5717 node->tablefunc = tablefunc;
5718
5719 return node;
5720}
5721
5722static ValuesScan *
5723make_valuesscan(List *qptlist,
5724 List *qpqual,
5725 Index scanrelid,
5726 List *values_lists)
5727{
5728 ValuesScan *node = makeNode(ValuesScan);
5729 Plan *plan = &node->scan.plan;
5730
5731 plan->targetlist = qptlist;
5732 plan->qual = qpqual;
5733 plan->lefttree = NULL;
5734 plan->righttree = NULL;
5735 node->scan.scanrelid = scanrelid;
5736 node->values_lists = values_lists;
5737
5738 return node;
5739}
5740
5741static CteScan *
5742make_ctescan(List *qptlist,
5743 List *qpqual,
5744 Index scanrelid,
5745 int ctePlanId,
5746 int cteParam)
5747{
5748 CteScan *node = makeNode(CteScan);
5749 Plan *plan = &node->scan.plan;
5750
5751 plan->targetlist = qptlist;
5752 plan->qual = qpqual;
5753 plan->lefttree = NULL;
5754 plan->righttree = NULL;
5755 node->scan.scanrelid = scanrelid;
5756 node->ctePlanId = ctePlanId;
5757 node->cteParam = cteParam;
5758
5759 return node;
5760}
5761
5762static NamedTuplestoreScan *
5763make_namedtuplestorescan(List *qptlist,
5764 List *qpqual,
5765 Index scanrelid,
5766 char *enrname)
5767{
5768 NamedTuplestoreScan *node = makeNode(NamedTuplestoreScan);
5769 Plan *plan = &node->scan.plan;
5770
5771 /* cost should be inserted by caller */
5772 plan->targetlist = qptlist;
5773 plan->qual = qpqual;
5774 plan->lefttree = NULL;
5775 plan->righttree = NULL;
5776 node->scan.scanrelid = scanrelid;
5777 node->enrname = enrname;
5778
5779 return node;
5780}
5781
5782static WorkTableScan *
5783make_worktablescan(List *qptlist,
5784 List *qpqual,
5785 Index scanrelid,
5786 int wtParam)
5787{
5788 WorkTableScan *node = makeNode(WorkTableScan);
5789 Plan *plan = &node->scan.plan;
5790
5791 plan->targetlist = qptlist;
5792 plan->qual = qpqual;
5793 plan->lefttree = NULL;
5794 plan->righttree = NULL;
5795 node->scan.scanrelid = scanrelid;
5796 node->wtParam = wtParam;
5797
5798 return node;
5799}
5800
5801ForeignScan *
5802make_foreignscan(List *qptlist,
5803 List *qpqual,
5804 Index scanrelid,
5805 List *fdw_exprs,
5806 List *fdw_private,
5807 List *fdw_scan_tlist,
5808 List *fdw_recheck_quals,
5809 Plan *outer_plan)
5810{
5811 ForeignScan *node = makeNode(ForeignScan);
5812 Plan *plan = &node->scan.plan;
5813
5814 /* cost will be filled in by create_foreignscan_plan */
5815 plan->targetlist = qptlist;
5816 plan->qual = qpqual;
5817 plan->lefttree = outer_plan;
5818 plan->righttree = NULL;
5819 node->scan.scanrelid = scanrelid;
5820
5821 /* these may be overridden by the FDW's PlanDirectModify callback. */
5822 node->operation = CMD_SELECT;
5823 node->resultRelation = 0;
5824
5825 /* checkAsUser, fs_server will be filled in by create_foreignscan_plan */
5826 node->checkAsUser = InvalidOid;
5827 node->fs_server = InvalidOid;
5828 node->fdw_exprs = fdw_exprs;
5829 node->fdw_private = fdw_private;
5830 node->fdw_scan_tlist = fdw_scan_tlist;
5831 node->fdw_recheck_quals = fdw_recheck_quals;
5832 /* fs_relids, fs_base_relids will be filled by create_foreignscan_plan */
5833 node->fs_relids = NULL;
5834 node->fs_base_relids = NULL;
5835 /* fsSystemCol will be filled in by create_foreignscan_plan */
5836 node->fsSystemCol = false;
5837
5838 return node;
5839}
5840
5841static RecursiveUnion *
5842make_recursive_union(List *tlist,
5843 Plan *lefttree,
5844 Plan *righttree,
5845 int wtParam,
5846 List *distinctList,
5847 Cardinality numGroups)
5848{
5849 RecursiveUnion *node = makeNode(RecursiveUnion);
5850 Plan *plan = &node->plan;
5851 int numCols = list_length(distinctList);
5852
5853 plan->targetlist = tlist;
5854 plan->qual = NIL;
5855 plan->lefttree = lefttree;
5856 plan->righttree = righttree;
5857 node->wtParam = wtParam;
5858
5859 /*
5860 * convert SortGroupClause list into arrays of attr indexes and equality
5861 * operators, as wanted by executor
5862 */
5863 node->numCols = numCols;
5864 if (numCols > 0)
5865 {
5866 int keyno = 0;
5867 AttrNumber *dupColIdx;
5868 Oid *dupOperators;
5869 Oid *dupCollations;
5870 ListCell *slitem;
5871
5872 dupColIdx = palloc_array(AttrNumber, numCols);
5873 dupOperators = palloc_array(Oid, numCols);
5874 dupCollations = palloc_array(Oid, numCols);
5875
5876 foreach(slitem, distinctList)
5877 {
5878 SortGroupClause *sortcl = (SortGroupClause *) lfirst(slitem);
5879 TargetEntry *tle = get_sortgroupclause_tle(sortcl,
5880 plan->targetlist);
5881
5882 dupColIdx[keyno] = tle->resno;
5883 dupOperators[keyno] = sortcl->eqop;
5884 dupCollations[keyno] = exprCollation((Node *) tle->expr);
5885 Assert(OidIsValid(dupOperators[keyno]));
5886 keyno++;
5887 }
5888 node->dupColIdx = dupColIdx;
5889 node->dupOperators = dupOperators;
5890 node->dupCollations = dupCollations;
5891 }
5892 node->numGroups = numGroups;
5893
5894 return node;
5895}
5896
5897static BitmapAnd *
5898make_bitmap_and(List *bitmapplans)
5899{
5900 BitmapAnd *node = makeNode(BitmapAnd);
5901 Plan *plan = &node->plan;
5902
5903 plan->targetlist = NIL;
5904 plan->qual = NIL;
5905 plan->lefttree = NULL;
5906 plan->righttree = NULL;
5907 node->bitmapplans = bitmapplans;
5908
5909 return node;
5910}
5911
5912static BitmapOr *
5913make_bitmap_or(List *bitmapplans)
5914{
5915 BitmapOr *node = makeNode(BitmapOr);
5916 Plan *plan = &node->plan;
5917
5918 plan->targetlist = NIL;
5919 plan->qual = NIL;
5920 plan->lefttree = NULL;
5921 plan->righttree = NULL;
5922 node->bitmapplans = bitmapplans;
5923
5924 return node;
5925}
5926
5927static NestLoop *
5928make_nestloop(List *tlist,
5929 List *joinclauses,
5930 List *otherclauses,
5931 List *nestParams,
5932 Plan *lefttree,
5933 Plan *righttree,
5934 JoinType jointype,
5935 bool inner_unique)
5936{
5937 NestLoop *node = makeNode(NestLoop);
5938 Plan *plan = &node->join.plan;
5939
5940 plan->targetlist = tlist;
5941 plan->qual = otherclauses;
5942 plan->lefttree = lefttree;
5943 plan->righttree = righttree;
5944 node->join.jointype = jointype;
5945 node->join.inner_unique = inner_unique;
5946 node->join.joinqual = joinclauses;
5947 node->nestParams = nestParams;
5948
5949 return node;
5950}
5951
5952static HashJoin *
5953make_hashjoin(List *tlist,
5954 List *joinclauses,
5955 List *otherclauses,
5956 List *hashclauses,
5957 List *hashoperators,
5958 List *hashcollations,
5959 List *hashkeys,
5960 Plan *lefttree,
5961 Plan *righttree,
5962 JoinType jointype,
5963 bool inner_unique)
5964{
5965 HashJoin *node = makeNode(HashJoin);
5966 Plan *plan = &node->join.plan;
5967
5968 plan->targetlist = tlist;
5969 plan->qual = otherclauses;
5970 plan->lefttree = lefttree;
5971 plan->righttree = righttree;
5972 node->hashclauses = hashclauses;
5973 node->hashoperators = hashoperators;
5974 node->hashcollations = hashcollations;
5975 node->hashkeys = hashkeys;
5976 node->join.jointype = jointype;
5977 node->join.inner_unique = inner_unique;
5978 node->join.joinqual = joinclauses;
5979
5980 return node;
5981}
5982
5983static Hash *
5984make_hash(Plan *lefttree,
5985 List *hashkeys,
5986 Oid skewTable,
5987 AttrNumber skewColumn,
5988 bool skewInherit)
5989{
5990 Hash *node = makeNode(Hash);
5991 Plan *plan = &node->plan;
5992
5993 plan->targetlist = lefttree->targetlist;
5994 plan->qual = NIL;
5995 plan->lefttree = lefttree;
5996 plan->righttree = NULL;
5997
5998 node->hashkeys = hashkeys;
5999 node->skewTable = skewTable;
6000 node->skewColumn = skewColumn;
6001 node->skewInherit = skewInherit;
6002
6003 return node;
6004}
6005
6006static MergeJoin *
6007make_mergejoin(List *tlist,
6008 List *joinclauses,
6009 List *otherclauses,
6010 List *mergeclauses,
6011 Oid *mergefamilies,
6012 Oid *mergecollations,
6013 bool *mergereversals,
6014 bool *mergenullsfirst,
6015 Plan *lefttree,
6016 Plan *righttree,
6017 JoinType jointype,
6018 bool inner_unique,
6019 bool skip_mark_restore)
6020{
6021 MergeJoin *node = makeNode(MergeJoin);
6022 Plan *plan = &node->join.plan;
6023
6024 plan->targetlist = tlist;
6025 plan->qual = otherclauses;
6026 plan->lefttree = lefttree;
6027 plan->righttree = righttree;
6028 node->skip_mark_restore = skip_mark_restore;
6029 node->mergeclauses = mergeclauses;
6030 node->mergeFamilies = mergefamilies;
6031 node->mergeCollations = mergecollations;
6032 node->mergeReversals = mergereversals;
6033 node->mergeNullsFirst = mergenullsfirst;
6034 node->join.jointype = jointype;
6035 node->join.inner_unique = inner_unique;
6036 node->join.joinqual = joinclauses;
6037
6038 return node;
6039}
6040
6041/*
6042 * make_sort --- basic routine to build a Sort plan node
6043 *
6044 * Caller must have built the sortColIdx, sortOperators, collations, and
6045 * nullsFirst arrays already.
6046 */
6047static Sort *
6048make_sort(Plan *lefttree, int numCols,
6049 AttrNumber *sortColIdx, Oid *sortOperators,
6050 Oid *collations, bool *nullsFirst)
6051{
6052 Sort *node;
6053 Plan *plan;
6054
6055 node = makeNode(Sort);
6056
6057 plan = &node->plan;
6058 plan->targetlist = lefttree->targetlist;
6059 plan->disabled_nodes = lefttree->disabled_nodes + (enable_sort == false);
6060 plan->qual = NIL;
6061 plan->lefttree = lefttree;
6062 plan->righttree = NULL;
6063 node->numCols = numCols;
6064 node->sortColIdx = sortColIdx;
6065 node->sortOperators = sortOperators;
6066 node->collations = collations;
6067 node->nullsFirst = nullsFirst;
6068
6069 return node;
6070}
6071
6072/*
6073 * make_incrementalsort --- basic routine to build an IncrementalSort plan node
6074 *
6075 * Caller must have built the sortColIdx, sortOperators, collations, and
6076 * nullsFirst arrays already.
6077 */
6078static IncrementalSort *
6079make_incrementalsort(Plan *lefttree, int numCols, int nPresortedCols,
6080 AttrNumber *sortColIdx, Oid *sortOperators,
6081 Oid *collations, bool *nullsFirst)
6082{
6083 IncrementalSort *node;
6084 Plan *plan;
6085
6086 node = makeNode(IncrementalSort);
6087
6088 plan = &node->sort.plan;
6089 plan->targetlist = lefttree->targetlist;
6090 plan->qual = NIL;
6091 plan->lefttree = lefttree;
6092 plan->righttree = NULL;
6093 node->nPresortedCols = nPresortedCols;
6094 node->sort.numCols = numCols;
6095 node->sort.sortColIdx = sortColIdx;
6096 node->sort.sortOperators = sortOperators;
6097 node->sort.collations = collations;
6098 node->sort.nullsFirst = nullsFirst;
6099
6100 return node;
6101}
6102
6103/*
6104 * prepare_sort_from_pathkeys
6105 * Prepare to sort according to given pathkeys
6106 *
6107 * This is used to set up for Sort, MergeAppend, and Gather Merge nodes. It
6108 * calculates the executor's representation of the sort key information, and
6109 * adjusts the plan targetlist if needed to add resjunk sort columns.
6110 *
6111 * Input parameters:
6112 * 'lefttree' is the plan node which yields input tuples
6113 * 'pathkeys' is the list of pathkeys by which the result is to be sorted
6114 * 'relids' identifies the child relation being sorted, if any
6115 * 'reqColIdx' is NULL or an array of required sort key column numbers
6116 * 'adjust_tlist_in_place' is true if lefttree must be modified in-place
6117 *
6118 * We must convert the pathkey information into arrays of sort key column
6119 * numbers, sort operator OIDs, collation OIDs, and nulls-first flags,
6120 * which is the representation the executor wants. These are returned into
6121 * the output parameters *p_numsortkeys etc.
6122 *
6123 * When looking for matches to an EquivalenceClass's members, we will only
6124 * consider child EC members if they belong to given 'relids'. This protects
6125 * against possible incorrect matches to child expressions that contain no
6126 * Vars.
6127 *
6128 * If reqColIdx isn't NULL then it contains sort key column numbers that
6129 * we should match. This is used when making child plans for a MergeAppend;
6130 * it's an error if we can't match the columns.
6131 *
6132 * If the pathkeys include expressions that aren't simple Vars, we will
6133 * usually need to add resjunk items to the input plan's targetlist to
6134 * compute these expressions, since a Sort or MergeAppend node itself won't
6135 * do any such calculations. If the input plan type isn't one that can do
6136 * projections, this means adding a Result node just to do the projection.
6137 * However, the caller can pass adjust_tlist_in_place = true to force the
6138 * lefttree tlist to be modified in-place regardless of whether the node type
6139 * can project --- we use this for fixing the tlist of MergeAppend itself.
6140 *
6141 * Returns the node which is to be the input to the Sort (either lefttree,
6142 * or a Result stacked atop lefttree).
6143 */
6144static Plan *
6145prepare_sort_from_pathkeys(Plan *lefttree, List *pathkeys,
6146 Relids relids,
6147 const AttrNumber *reqColIdx,
6148 bool adjust_tlist_in_place,
6149 int *p_numsortkeys,
6150 AttrNumber **p_sortColIdx,
6151 Oid **p_sortOperators,
6152 Oid **p_collations,
6153 bool **p_nullsFirst)
6154{
6155 List *tlist = lefttree->targetlist;
6156 ListCell *i;
6157 int numsortkeys;
6158 AttrNumber *sortColIdx;
6159 Oid *sortOperators;
6160 Oid *collations;
6161 bool *nullsFirst;
6162
6163 /*
6164 * We will need at most list_length(pathkeys) sort columns; possibly less
6165 */
6166 numsortkeys = list_length(pathkeys);
6167 sortColIdx = (AttrNumber *) palloc(numsortkeys * sizeof(AttrNumber));
6168 sortOperators = (Oid *) palloc(numsortkeys * sizeof(Oid));
6169 collations = (Oid *) palloc(numsortkeys * sizeof(Oid));
6170 nullsFirst = (bool *) palloc(numsortkeys * sizeof(bool));
6171
6172 numsortkeys = 0;
6173
6174 foreach(i, pathkeys)
6175 {
6176 PathKey *pathkey = (PathKey *) lfirst(i);
6177 EquivalenceClass *ec = pathkey->pk_eclass;
6178 EquivalenceMember *em;
6179 TargetEntry *tle = NULL;
6180 Oid pk_datatype = InvalidOid;
6181 Oid sortop;
6182 ListCell *j;
6183
6184 if (ec->ec_has_volatile)
6185 {
6186 /*
6187 * If the pathkey's EquivalenceClass is volatile, then it must
6188 * have come from an ORDER BY clause, and we have to match it to
6189 * that same targetlist entry.
6190 */
6191 if (ec->ec_sortref == 0) /* can't happen */
6192 elog(ERROR, "volatile EquivalenceClass has no sortref");
6193 tle = get_sortgroupref_tle(ec->ec_sortref, tlist);
6194 Assert(tle);
6195 Assert(list_length(ec->ec_members) == 1);
6196 pk_datatype = ((EquivalenceMember *) linitial(ec->ec_members))->em_datatype;
6197 }
6198 else if (reqColIdx != NULL)
6199 {
6200 /*
6201 * If we are given a sort column number to match, only consider
6202 * the single TLE at that position. It's possible that there is
6203 * no such TLE, in which case fall through and generate a resjunk
6204 * targetentry (we assume this must have happened in the parent
6205 * plan as well). If there is a TLE but it doesn't match the
6206 * pathkey's EC, we do the same, which is probably the wrong thing
6207 * but we'll leave it to caller to complain about the mismatch.
6208 */
6209 tle = get_tle_by_resno(tlist, reqColIdx[numsortkeys]);
6210 if (tle)
6211 {
6212 em = find_ec_member_matching_expr(ec, tle->expr, relids);
6213 if (em)
6214 {
6215 /* found expr at right place in tlist */
6216 pk_datatype = em->em_datatype;
6217 }
6218 else
6219 tle = NULL;
6220 }
6221 }
6222 else
6223 {
6224 /*
6225 * Otherwise, we can sort by any non-constant expression listed in
6226 * the pathkey's EquivalenceClass. For now, we take the first
6227 * tlist item found in the EC. If there's no match, we'll generate
6228 * a resjunk entry using the first EC member that is an expression
6229 * in the input's vars.
6230 *
6231 * XXX if we have a choice, is there any way of figuring out which
6232 * might be cheapest to execute? (For example, int4lt is likely
6233 * much cheaper to execute than numericlt, but both might appear
6234 * in the same equivalence class...) Not clear that we ever will
6235 * have an interesting choice in practice, so it may not matter.
6236 */
6237 foreach(j, tlist)
6238 {
6239 tle = (TargetEntry *) lfirst(j);
6240 em = find_ec_member_matching_expr(ec, tle->expr, relids);
6241 if (em)
6242 {
6243 /* found expr already in tlist */
6244 pk_datatype = em->em_datatype;
6245 break;
6246 }
6247 tle = NULL;
6248 }
6249 }
6250
6251 if (!tle)
6252 {
6253 /*
6254 * No matching tlist item; look for a computable expression.
6255 */
6256 em = find_computable_ec_member(NULL, ec, tlist, relids, false);
6257 if (!em)
6258 elog(ERROR, "could not find pathkey item to sort");
6259 pk_datatype = em->em_datatype;
6260
6261 /*
6262 * Do we need to insert a Result node?
6263 */
6264 if (!adjust_tlist_in_place &&
6265 !is_projection_capable_plan(lefttree))
6266 {
6267 /* copy needed so we don't modify input's tlist below */
6268 tlist = copyObject(tlist);
6269 lefttree = inject_projection_plan(lefttree, tlist,
6270 lefttree->parallel_safe);
6271 }
6272
6273 /* Don't bother testing is_projection_capable_plan again */
6274 adjust_tlist_in_place = true;
6275
6276 /*
6277 * Add resjunk entry to input's tlist
6278 */
6279 tle = makeTargetEntry(copyObject(em->em_expr),
6280 list_length(tlist) + 1,
6281 NULL,
6282 true);
6283 tlist = lappend(tlist, tle);
6284 lefttree->targetlist = tlist; /* just in case NIL before */
6285 }
6286
6287 /*
6288 * Look up the correct sort operator from the PathKey's slightly
6289 * abstracted representation.
6290 */
6291 sortop = get_opfamily_member_for_cmptype(pathkey->pk_opfamily,
6292 pk_datatype,
6293 pk_datatype,
6294 pathkey->pk_cmptype);
6295 if (!OidIsValid(sortop)) /* should not happen */
6296 elog(ERROR, "missing operator %d(%u,%u) in opfamily %u",
6297 pathkey->pk_cmptype, pk_datatype, pk_datatype,
6298 pathkey->pk_opfamily);
6299
6300 /* Add the column to the sort arrays */
6301 sortColIdx[numsortkeys] = tle->resno;
6302 sortOperators[numsortkeys] = sortop;
6303 collations[numsortkeys] = ec->ec_collation;
6304 nullsFirst[numsortkeys] = pathkey->pk_nulls_first;
6305 numsortkeys++;
6306 }
6307
6308 /* Return results */
6309 *p_numsortkeys = numsortkeys;
6310 *p_sortColIdx = sortColIdx;
6311 *p_sortOperators = sortOperators;
6312 *p_collations = collations;
6313 *p_nullsFirst = nullsFirst;
6314
6315 return lefttree;
6316}
6317
6318/*
6319 * make_sort_from_pathkeys
6320 * Create sort plan to sort according to given pathkeys
6321 *
6322 * 'lefttree' is the node which yields input tuples
6323 * 'pathkeys' is the list of pathkeys by which the result is to be sorted
6324 * 'relids' is the set of relations required by prepare_sort_from_pathkeys()
6325 */
6326static Sort *
6327make_sort_from_pathkeys(Plan *lefttree, List *pathkeys, Relids relids)
6328{
6329 int numsortkeys;
6330 AttrNumber *sortColIdx;
6331 Oid *sortOperators;
6332 Oid *collations;
6333 bool *nullsFirst;
6334
6335 /* Compute sort column info, and adjust lefttree as needed */
6336 lefttree = prepare_sort_from_pathkeys(lefttree, pathkeys,
6337 relids,
6338 NULL,
6339 false,
6340 &numsortkeys,
6341 &sortColIdx,
6342 &sortOperators,
6343 &collations,
6344 &nullsFirst);
6345
6346 /* Now build the Sort node */
6347 return make_sort(lefttree, numsortkeys,
6348 sortColIdx, sortOperators,
6349 collations, nullsFirst);
6350}
6351
6352/*
6353 * make_incrementalsort_from_pathkeys
6354 * Create sort plan to sort according to given pathkeys
6355 *
6356 * 'lefttree' is the node which yields input tuples
6357 * 'pathkeys' is the list of pathkeys by which the result is to be sorted
6358 * 'relids' is the set of relations required by prepare_sort_from_pathkeys()
6359 * 'nPresortedCols' is the number of presorted columns in input tuples
6360 */
6361static IncrementalSort *
6362make_incrementalsort_from_pathkeys(Plan *lefttree, List *pathkeys,
6363 Relids relids, int nPresortedCols)
6364{
6365 int numsortkeys;
6366 AttrNumber *sortColIdx;
6367 Oid *sortOperators;
6368 Oid *collations;
6369 bool *nullsFirst;
6370
6371 /* Compute sort column info, and adjust lefttree as needed */
6372 lefttree = prepare_sort_from_pathkeys(lefttree, pathkeys,
6373 relids,
6374 NULL,
6375 false,
6376 &numsortkeys,
6377 &sortColIdx,
6378 &sortOperators,
6379 &collations,
6380 &nullsFirst);
6381
6382 /* Now build the Sort node */
6383 return make_incrementalsort(lefttree, numsortkeys, nPresortedCols,
6384 sortColIdx, sortOperators,
6385 collations, nullsFirst);
6386}
6387
6388/*
6389 * make_sort_from_sortclauses
6390 * Create sort plan to sort according to given sortclauses
6391 *
6392 * 'sortcls' is a list of SortGroupClauses
6393 * 'lefttree' is the node which yields input tuples
6394 */
6395Sort *
6396make_sort_from_sortclauses(List *sortcls, Plan *lefttree)
6397{
6398 List *sub_tlist = lefttree->targetlist;
6399 ListCell *l;
6400 int numsortkeys;
6401 AttrNumber *sortColIdx;
6402 Oid *sortOperators;
6403 Oid *collations;
6404 bool *nullsFirst;
6405
6406 /* Convert list-ish representation to arrays wanted by executor */
6407 numsortkeys = list_length(sortcls);
6408 sortColIdx = (AttrNumber *) palloc(numsortkeys * sizeof(AttrNumber));
6409 sortOperators = (Oid *) palloc(numsortkeys * sizeof(Oid));
6410 collations = (Oid *) palloc(numsortkeys * sizeof(Oid));
6411 nullsFirst = (bool *) palloc(numsortkeys * sizeof(bool));
6412
6413 numsortkeys = 0;
6414 foreach(l, sortcls)
6415 {
6416 SortGroupClause *sortcl = (SortGroupClause *) lfirst(l);
6417 TargetEntry *tle = get_sortgroupclause_tle(sortcl, sub_tlist);
6418
6419 sortColIdx[numsortkeys] = tle->resno;
6420 sortOperators[numsortkeys] = sortcl->sortop;
6421 collations[numsortkeys] = exprCollation((Node *) tle->expr);
6422 nullsFirst[numsortkeys] = sortcl->nulls_first;
6423 numsortkeys++;
6424 }
6425
6426 return make_sort(lefttree, numsortkeys,
6427 sortColIdx, sortOperators,
6428 collations, nullsFirst);
6429}
6430
6431/*
6432 * make_sort_from_groupcols
6433 * Create sort plan to sort based on grouping columns
6434 *
6435 * 'groupcls' is the list of SortGroupClauses
6436 * 'grpColIdx' gives the column numbers to use
6437 *
6438 * This might look like it could be merged with make_sort_from_sortclauses,
6439 * but presently we *must* use the grpColIdx[] array to locate sort columns,
6440 * because the child plan's tlist is not marked with ressortgroupref info
6441 * appropriate to the grouping node. So, only the sort ordering info
6442 * is used from the SortGroupClause entries.
6443 */
6444static Sort *
6445make_sort_from_groupcols(List *groupcls,
6446 AttrNumber *grpColIdx,
6447 Plan *lefttree)
6448{
6449 List *sub_tlist = lefttree->targetlist;
6450 ListCell *l;
6451 int numsortkeys;
6452 AttrNumber *sortColIdx;
6453 Oid *sortOperators;
6454 Oid *collations;
6455 bool *nullsFirst;
6456
6457 /* Convert list-ish representation to arrays wanted by executor */
6458 numsortkeys = list_length(groupcls);
6459 sortColIdx = (AttrNumber *) palloc(numsortkeys * sizeof(AttrNumber));
6460 sortOperators = (Oid *) palloc(numsortkeys * sizeof(Oid));
6461 collations = (Oid *) palloc(numsortkeys * sizeof(Oid));
6462 nullsFirst = (bool *) palloc(numsortkeys * sizeof(bool));
6463
6464 numsortkeys = 0;
6465 foreach(l, groupcls)
6466 {
6467 SortGroupClause *grpcl = (SortGroupClause *) lfirst(l);
6468 TargetEntry *tle = get_tle_by_resno(sub_tlist, grpColIdx[numsortkeys]);
6469
6470 if (!tle)
6471 elog(ERROR, "could not retrieve tle for sort-from-groupcols");
6472
6473 sortColIdx[numsortkeys] = tle->resno;
6474 sortOperators[numsortkeys] = grpcl->sortop;
6475 collations[numsortkeys] = exprCollation((Node *) tle->expr);
6476 nullsFirst[numsortkeys] = grpcl->nulls_first;
6477 numsortkeys++;
6478 }
6479
6480 return make_sort(lefttree, numsortkeys,
6481 sortColIdx, sortOperators,
6482 collations, nullsFirst);
6483}
6484
6485static Material *
6486make_material(Plan *lefttree)
6487{
6488 Material *node = makeNode(Material);
6489 Plan *plan = &node->plan;
6490
6491 plan->targetlist = lefttree->targetlist;
6492 plan->qual = NIL;
6493 plan->lefttree = lefttree;
6494 plan->righttree = NULL;
6495
6496 return node;
6497}
6498
6499/*
6500 * materialize_finished_plan: stick a Material node atop a completed plan
6501 *
6502 * There are a couple of places where we want to attach a Material node
6503 * after completion of create_plan(), without any MaterialPath path.
6504 * Those places should probably be refactored someday to do this on the
6505 * Path representation, but it's not worth the trouble yet.
6506 */
6507Plan *
6508materialize_finished_plan(Plan *subplan)
6509{
6510 Plan *matplan;
6511 Path matpath; /* dummy for cost_material */
6512 Cost initplan_cost;
6513 bool unsafe_initplans;
6514
6515 matplan = (Plan *) make_material(subplan);
6516
6517 /*
6518 * XXX horrid kluge: if there are any initPlans attached to the subplan,
6519 * move them up to the Material node, which is now effectively the top
6520 * plan node in its query level. This prevents failure in
6521 * SS_finalize_plan(), which see for comments.
6522 */
6523 matplan->initPlan = subplan->initPlan;
6524 subplan->initPlan = NIL;
6525
6526 /* Move the initplans' cost delta, as well */
6527 SS_compute_initplan_cost(matplan->initPlan,
6528 &initplan_cost, &unsafe_initplans);
6529 subplan->startup_cost -= initplan_cost;
6530 subplan->total_cost -= initplan_cost;
6531
6532 /* Set cost data */
6533 cost_material(&matpath,
6534 enable_material,
6535 subplan->disabled_nodes,
6536 subplan->startup_cost,
6537 subplan->total_cost,
6538 subplan->plan_rows,
6539 subplan->plan_width);
6540 matplan->disabled_nodes = subplan->disabled_nodes;
6541 matplan->startup_cost = matpath.startup_cost + initplan_cost;
6542 matplan->total_cost = matpath.total_cost + initplan_cost;
6543 matplan->plan_rows = subplan->plan_rows;
6544 matplan->plan_width = subplan->plan_width;
6545 matplan->parallel_aware = false;
6546 matplan->parallel_safe = subplan->parallel_safe;
6547
6548 return matplan;
6549}
6550
6551static Memoize *
6552make_memoize(Plan *lefttree, Oid *hashoperators, Oid *collations,
6553 List *param_exprs, bool singlerow, bool binary_mode,
6554 uint32 est_entries, Bitmapset *keyparamids,
6555 Cardinality est_calls, Cardinality est_unique_keys,
6556 double est_hit_ratio)
6557{
6558 Memoize *node = makeNode(Memoize);
6559 Plan *plan = &node->plan;
6560
6561 plan->targetlist = lefttree->targetlist;
6562 plan->qual = NIL;
6563 plan->lefttree = lefttree;
6564 plan->righttree = NULL;
6565
6566 node->numKeys = list_length(param_exprs);
6567 node->hashOperators = hashoperators;
6568 node->collations = collations;
6569 node->param_exprs = param_exprs;
6570 node->singlerow = singlerow;
6571 node->binary_mode = binary_mode;
6572 node->est_entries = est_entries;
6573 node->keyparamids = keyparamids;
6574 node->est_calls = est_calls;
6575 node->est_unique_keys = est_unique_keys;
6576 node->est_hit_ratio = est_hit_ratio;
6577
6578 return node;
6579}
6580
6581Agg *
6582make_agg(List *tlist, List *qual,
6583 AggStrategy aggstrategy, AggSplit aggsplit,
6584 int numGroupCols, AttrNumber *grpColIdx, Oid *grpOperators, Oid *grpCollations,
6585 List *groupingSets, List *chain, Cardinality numGroups,
6586 Size transitionSpace, Plan *lefttree)
6587{
6588 Agg *node = makeNode(Agg);
6589 Plan *plan = &node->plan;
6590
6591 node->aggstrategy = aggstrategy;
6592 node->aggsplit = aggsplit;
6593 node->numCols = numGroupCols;
6594 node->grpColIdx = grpColIdx;
6595 node->grpOperators = grpOperators;
6596 node->grpCollations = grpCollations;
6597 node->numGroups = numGroups;
6598 node->transitionSpace = transitionSpace;
6599 node->aggParams = NULL; /* SS_finalize_plan() will fill this */
6600 node->groupingSets = groupingSets;
6601 node->chain = chain;
6602
6603 plan->qual = qual;
6604 plan->targetlist = tlist;
6605 plan->lefttree = lefttree;
6606 plan->righttree = NULL;
6607
6608 return node;
6609}
6610
6611static WindowAgg *
6612make_windowagg(List *tlist, WindowClause *wc,
6613 int partNumCols, AttrNumber *partColIdx, Oid *partOperators, Oid *partCollations,
6614 int ordNumCols, AttrNumber *ordColIdx, Oid *ordOperators, Oid *ordCollations,
6615 List *runCondition, List *qual, bool topWindow, Plan *lefttree)
6616{
6617 WindowAgg *node = makeNode(WindowAgg);
6618 Plan *plan = &node->plan;
6619
6620 node->winname = wc->name;
6621 node->winref = wc->winref;
6622 node->partNumCols = partNumCols;
6623 node->partColIdx = partColIdx;
6624 node->partOperators = partOperators;
6625 node->partCollations = partCollations;
6626 node->ordNumCols = ordNumCols;
6627 node->ordColIdx = ordColIdx;
6628 node->ordOperators = ordOperators;
6629 node->ordCollations = ordCollations;
6630 node->frameOptions = wc->frameOptions;
6631 node->startOffset = wc->startOffset;
6632 node->endOffset = wc->endOffset;
6633 node->runCondition = runCondition;
6634 /* a duplicate of the above for EXPLAIN */
6635 node->runConditionOrig = runCondition;
6636 node->startInRangeFunc = wc->startInRangeFunc;
6637 node->endInRangeFunc = wc->endInRangeFunc;
6638 node->inRangeColl = wc->inRangeColl;
6639 node->inRangeAsc = wc->inRangeAsc;
6640 node->inRangeNullsFirst = wc->inRangeNullsFirst;
6641 node->topWindow = topWindow;
6642
6643 plan->targetlist = tlist;
6644 plan->lefttree = lefttree;
6645 plan->righttree = NULL;
6646 plan->qual = qual;
6647
6648 return node;
6649}
6650
6651static Group *
6652make_group(List *tlist,
6653 List *qual,
6654 int numGroupCols,
6655 AttrNumber *grpColIdx,
6656 Oid *grpOperators,
6657 Oid *grpCollations,
6658 Plan *lefttree)
6659{
6660 Group *node = makeNode(Group);
6661 Plan *plan = &node->plan;
6662
6663 node->numCols = numGroupCols;
6664 node->grpColIdx = grpColIdx;
6665 node->grpOperators = grpOperators;
6666 node->grpCollations = grpCollations;
6667
6668 plan->qual = qual;
6669 plan->targetlist = tlist;
6670 plan->lefttree = lefttree;
6671 plan->righttree = NULL;
6672
6673 return node;
6674}
6675
6676/*
6677 * pathkeys is a list of PathKeys, identifying the sort columns and semantics.
6678 * The input plan must already be sorted accordingly.
6679 *
6680 * relids identifies the child relation being unique-ified, if any.
6681 */
6682static Unique *
6683make_unique_from_pathkeys(Plan *lefttree, List *pathkeys, int numCols,
6684 Relids relids)
6685{
6686 Unique *node = makeNode(Unique);
6687 Plan *plan = &node->plan;
6688 int keyno = 0;
6689 AttrNumber *uniqColIdx;
6690 Oid *uniqOperators;
6691 Oid *uniqCollations;
6692 ListCell *lc;
6693
6694 plan->targetlist = lefttree->targetlist;
6695 plan->qual = NIL;
6696 plan->lefttree = lefttree;
6697 plan->righttree = NULL;
6698
6699 /*
6700 * Convert pathkeys list into arrays of attr indexes and equality
6701 * operators, as wanted by executor. This has a lot in common with
6702 * prepare_sort_from_pathkeys ... maybe unify sometime?
6703 */
6704 Assert(numCols >= 0 && numCols <= list_length(pathkeys));
6705 uniqColIdx = palloc_array(AttrNumber, numCols);
6706 uniqOperators = palloc_array(Oid, numCols);
6707 uniqCollations = palloc_array(Oid, numCols);
6708
6709 foreach(lc, pathkeys)
6710 {
6711 PathKey *pathkey = (PathKey *) lfirst(lc);
6712 EquivalenceClass *ec = pathkey->pk_eclass;
6713 EquivalenceMember *em;
6714 TargetEntry *tle = NULL;
6715 Oid pk_datatype = InvalidOid;
6716 Oid eqop;
6717 ListCell *j;
6718
6719 /* Ignore pathkeys beyond the specified number of columns */
6720 if (keyno >= numCols)
6721 break;
6722
6723 if (ec->ec_has_volatile)
6724 {
6725 /*
6726 * If the pathkey's EquivalenceClass is volatile, then it must
6727 * have come from an ORDER BY clause, and we have to match it to
6728 * that same targetlist entry.
6729 */
6730 if (ec->ec_sortref == 0) /* can't happen */
6731 elog(ERROR, "volatile EquivalenceClass has no sortref");
6732 tle = get_sortgroupref_tle(ec->ec_sortref, plan->targetlist);
6733 Assert(tle);
6734 Assert(list_length(ec->ec_members) == 1);
6735 pk_datatype = ((EquivalenceMember *) linitial(ec->ec_members))->em_datatype;
6736 }
6737 else
6738 {
6739 /*
6740 * Otherwise, we can use any non-constant expression listed in the
6741 * pathkey's EquivalenceClass. For now, we take the first tlist
6742 * item found in the EC.
6743 */
6744 foreach(j, plan->targetlist)
6745 {
6746 tle = (TargetEntry *) lfirst(j);
6747 em = find_ec_member_matching_expr(ec, tle->expr, relids);
6748 if (em)
6749 {
6750 /* found expr already in tlist */
6751 pk_datatype = em->em_datatype;
6752 break;
6753 }
6754 tle = NULL;
6755 }
6756 }
6757
6758 if (!tle)
6759 elog(ERROR, "could not find pathkey item to sort");
6760
6761 /*
6762 * Look up the correct equality operator from the PathKey's slightly
6763 * abstracted representation.
6764 */
6765 eqop = get_opfamily_member_for_cmptype(pathkey->pk_opfamily,
6766 pk_datatype,
6767 pk_datatype,
6768 COMPARE_EQ);
6769 if (!OidIsValid(eqop)) /* should not happen */
6770 elog(ERROR, "missing operator %d(%u,%u) in opfamily %u",
6771 COMPARE_EQ, pk_datatype, pk_datatype,
6772 pathkey->pk_opfamily);
6773
6774 uniqColIdx[keyno] = tle->resno;
6775 uniqOperators[keyno] = eqop;
6776 uniqCollations[keyno] = ec->ec_collation;
6777
6778 keyno++;
6779 }
6780
6781 node->numCols = numCols;
6782 node->uniqColIdx = uniqColIdx;
6783 node->uniqOperators = uniqOperators;
6784 node->uniqCollations = uniqCollations;
6785
6786 return node;
6787}
6788
6789static Gather *
6790make_gather(List *qptlist,
6791 List *qpqual,
6792 int nworkers,
6793 int rescan_param,
6794 bool single_copy,
6795 Plan *subplan)
6796{
6797 Gather *node = makeNode(Gather);
6798 Plan *plan = &node->plan;
6799
6800 plan->targetlist = qptlist;
6801 plan->qual = qpqual;
6802 plan->lefttree = subplan;
6803 plan->righttree = NULL;
6804 node->num_workers = nworkers;
6805 node->rescan_param = rescan_param;
6806 node->single_copy = single_copy;
6807 node->invisible = false;
6808 node->initParam = NULL;
6809
6810 return node;
6811}
6812
6813/*
6814 * groupList is a list of SortGroupClauses, identifying the targetlist
6815 * items that should be considered by the SetOp filter. The input plans must
6816 * already be sorted accordingly, if we're doing SETOP_SORTED mode.
6817 */
6818static SetOp *
6819make_setop(SetOpCmd cmd, SetOpStrategy strategy,
6820 List *tlist, Plan *lefttree, Plan *righttree,
6821 List *groupList, Cardinality numGroups)
6822{
6823 SetOp *node = makeNode(SetOp);
6824 Plan *plan = &node->plan;
6825 int numCols = list_length(groupList);
6826 int keyno = 0;
6827 AttrNumber *cmpColIdx;
6828 Oid *cmpOperators;
6829 Oid *cmpCollations;
6830 bool *cmpNullsFirst;
6831 ListCell *slitem;
6832
6833 plan->targetlist = tlist;
6834 plan->qual = NIL;
6835 plan->lefttree = lefttree;
6836 plan->righttree = righttree;
6837
6838 /*
6839 * convert SortGroupClause list into arrays of attr indexes and comparison
6840 * operators, as wanted by executor
6841 */
6842 cmpColIdx = palloc_array(AttrNumber, numCols);
6843 cmpOperators = palloc_array(Oid, numCols);
6844 cmpCollations = palloc_array(Oid, numCols);
6845 cmpNullsFirst = palloc_array(bool, numCols);
6846
6847 foreach(slitem, groupList)
6848 {
6849 SortGroupClause *sortcl = (SortGroupClause *) lfirst(slitem);
6850 TargetEntry *tle = get_sortgroupclause_tle(sortcl, plan->targetlist);
6851
6852 cmpColIdx[keyno] = tle->resno;
6853 if (strategy == SETOP_HASHED)
6854 cmpOperators[keyno] = sortcl->eqop;
6855 else
6856 cmpOperators[keyno] = sortcl->sortop;
6857 Assert(OidIsValid(cmpOperators[keyno]));
6858 cmpCollations[keyno] = exprCollation((Node *) tle->expr);
6859 cmpNullsFirst[keyno] = sortcl->nulls_first;
6860 keyno++;
6861 }
6862
6863 node->cmd = cmd;
6864 node->strategy = strategy;
6865 node->numCols = numCols;
6866 node->cmpColIdx = cmpColIdx;
6867 node->cmpOperators = cmpOperators;
6868 node->cmpCollations = cmpCollations;
6869 node->cmpNullsFirst = cmpNullsFirst;
6870 node->numGroups = numGroups;
6871
6872 return node;
6873}
6874
6875/*
6876 * make_lockrows
6877 * Build a LockRows plan node
6878 */
6879static LockRows *
6880make_lockrows(Plan *lefttree, List *rowMarks, int epqParam)
6881{
6882 LockRows *node = makeNode(LockRows);
6883 Plan *plan = &node->plan;
6884
6885 plan->targetlist = lefttree->targetlist;
6886 plan->qual = NIL;
6887 plan->lefttree = lefttree;
6888 plan->righttree = NULL;
6889
6890 node->rowMarks = rowMarks;
6891 node->epqParam = epqParam;
6892
6893 return node;
6894}
6895
6896/*
6897 * make_limit
6898 * Build a Limit plan node
6899 */
6900Limit *
6901make_limit(Plan *lefttree, Node *limitOffset, Node *limitCount,
6902 LimitOption limitOption, int uniqNumCols, AttrNumber *uniqColIdx,
6903 Oid *uniqOperators, Oid *uniqCollations)
6904{
6905 Limit *node = makeNode(Limit);
6906 Plan *plan = &node->plan;
6907
6908 plan->targetlist = lefttree->targetlist;
6909 plan->qual = NIL;
6910 plan->lefttree = lefttree;
6911 plan->righttree = NULL;
6912
6913 node->limitOffset = limitOffset;
6914 node->limitCount = limitCount;
6915 node->limitOption = limitOption;
6916 node->uniqNumCols = uniqNumCols;
6917 node->uniqColIdx = uniqColIdx;
6918 node->uniqOperators = uniqOperators;
6919 node->uniqCollations = uniqCollations;
6920
6921 return node;
6922}
6923
6924/*
6925 * make_gating_result
6926 * Build a Result plan node that performs projection of a subplan, and/or
6927 * applies a one time filter (resconstantqual)
6928 */
6929static Result *
6930make_gating_result(List *tlist,
6931 Node *resconstantqual,
6932 Plan *subplan)
6933{
6934 Result *node = makeNode(Result);
6935 Plan *plan = &node->plan;
6936
6937 Assert(subplan != NULL);
6938
6939 plan->targetlist = tlist;
6940 plan->qual = NIL;
6941 plan->lefttree = subplan;
6942 plan->righttree = NULL;
6943 node->result_type = RESULT_TYPE_GATING;
6944 node->resconstantqual = resconstantqual;
6945 node->relids = NULL;
6946
6947 return node;
6948}
6949
6950/*
6951 * make_one_row_result
6952 * Build a Result plan node that returns a single row (or possibly no rows,
6953 * if the one-time filtered defined by resconstantqual returns false)
6954 *
6955 * 'rel' should be this path's RelOptInfo. In essence, we're saying that this
6956 * Result node generates all the tuples for that RelOptInfo. Note that the same
6957 * consideration can never arise in make_gating_result(), because in that case
6958 * the tuples are always coming from some subordinate node.
6959 */
6960static Result *
6961make_one_row_result(List *tlist,
6962 Node *resconstantqual,
6963 RelOptInfo *rel)
6964{
6965 Result *node = makeNode(Result);
6966 Plan *plan = &node->plan;
6967
6968 plan->targetlist = tlist;
6969 plan->qual = NIL;
6970 plan->lefttree = NULL;
6971 plan->righttree = NULL;
6972 node->result_type = IS_UPPER_REL(rel) ? RESULT_TYPE_UPPER :
6973 IS_JOIN_REL(rel) ? RESULT_TYPE_JOIN : RESULT_TYPE_SCAN;
6974 node->resconstantqual = resconstantqual;
6975 node->relids = rel->relids;
6976
6977 return node;
6978}
6979
6980/*
6981 * make_project_set
6982 * Build a ProjectSet plan node
6983 */
6984static ProjectSet *
6985make_project_set(List *tlist,
6986 Plan *subplan)
6987{
6988 ProjectSet *node = makeNode(ProjectSet);
6989 Plan *plan = &node->plan;
6990
6991 plan->targetlist = tlist;
6992 plan->qual = NIL;
6993 plan->lefttree = subplan;
6994 plan->righttree = NULL;
6995
6996 return node;
6997}
6998
6999/*
7000 * make_modifytable
7001 * Build a ModifyTable plan node
7002 */
7003static ModifyTable *
7004make_modifytable(PlannerInfo *root, Plan *subplan,
7005 CmdType operation, bool canSetTag,
7006 Index nominalRelation, Index rootRelation,
7007 List *resultRelations,
7008 List *updateColnosLists,
7009 List *withCheckOptionLists, List *returningLists,
7010 List *rowMarks, OnConflictExpr *onconflict,
7011 List *mergeActionLists, List *mergeJoinConditions,
7012 int epqParam)
7013{
7014 ModifyTable *node = makeNode(ModifyTable);
7015 bool returning_old_or_new = false;
7016 bool returning_old_or_new_valid = false;
7017 bool transition_tables = false;
7018 bool transition_tables_valid = false;
7019 List *fdw_private_list;
7020 Bitmapset *direct_modify_plans;
7021 ListCell *lc;
7022 int i;
7023
7024 Assert(operation == CMD_MERGE ||
7025 (operation == CMD_UPDATE ?
7026 list_length(resultRelations) == list_length(updateColnosLists) :
7027 updateColnosLists == NIL));
7028 Assert(withCheckOptionLists == NIL ||
7029 list_length(resultRelations) == list_length(withCheckOptionLists));
7030 Assert(returningLists == NIL ||
7031 list_length(resultRelations) == list_length(returningLists));
7032
7033 node->plan.lefttree = subplan;
7034 node->plan.righttree = NULL;
7035 node->plan.qual = NIL;
7036 /* setrefs.c will fill in the targetlist, if needed */
7037 node->plan.targetlist = NIL;
7038
7039 node->operation = operation;
7040 node->canSetTag = canSetTag;
7041 node->nominalRelation = nominalRelation;
7042 node->rootRelation = rootRelation;
7043 node->resultRelations = resultRelations;
7044 if (!onconflict)
7045 {
7046 node->onConflictAction = ONCONFLICT_NONE;
7047 node->onConflictLockStrength = LCS_NONE;
7048 node->onConflictSet = NIL;
7049 node->onConflictCols = NIL;
7050 node->onConflictWhere = NULL;
7051 node->arbiterIndexes = NIL;
7052 node->exclRelRTI = 0;
7053 node->exclRelTlist = NIL;
7054 }
7055 else
7056 {
7057 node->onConflictAction = onconflict->action;
7058
7059 /* Lock strength for ON CONFLICT DO SELECT [FOR UPDATE/SHARE] */
7060 node->onConflictLockStrength = onconflict->lockStrength;
7061
7062 /*
7063 * Here we convert the ON CONFLICT UPDATE tlist, if any, to the
7064 * executor's convention of having consecutive resno's. The actual
7065 * target column numbers are saved in node->onConflictCols. (This
7066 * could be done earlier, but there seems no need to.)
7067 */
7068 node->onConflictSet = onconflict->onConflictSet;
7069 node->onConflictCols =
7070 extract_update_targetlist_colnos(node->onConflictSet);
7071 node->onConflictWhere = onconflict->onConflictWhere;
7072
7073 /*
7074 * If a set of unique index inference elements was provided (an
7075 * INSERT...ON CONFLICT "inference specification"), then infer
7076 * appropriate unique indexes (or throw an error if none are
7077 * available).
7078 */
7079 node->arbiterIndexes = infer_arbiter_indexes(root);
7080
7081 node->exclRelRTI = onconflict->exclRelIndex;
7082 node->exclRelTlist = onconflict->exclRelTlist;
7083 }
7084 node->updateColnosLists = updateColnosLists;
7085 node->withCheckOptionLists = withCheckOptionLists;
7086 node->returningOldAlias = root->parse->returningOldAlias;
7087 node->returningNewAlias = root->parse->returningNewAlias;
7088 node->returningLists = returningLists;
7089 node->rowMarks = rowMarks;
7090 node->mergeActionLists = mergeActionLists;
7091 node->mergeJoinConditions = mergeJoinConditions;
7092 node->epqParam = epqParam;
7093
7094 /*
7095 * For each result relation that is a foreign table, allow the FDW to
7096 * construct private plan data, and accumulate it all into a list.
7097 */
7098 fdw_private_list = NIL;
7099 direct_modify_plans = NULL;
7100 i = 0;
7101 foreach(lc, resultRelations)
7102 {
7103 Index rti = lfirst_int(lc);
7104 FdwRoutine *fdwroutine;
7105 List *fdw_private;
7106 bool direct_modify;
7107
7108 /*
7109 * If possible, we want to get the FdwRoutine from our RelOptInfo for
7110 * the table. But sometimes we don't have a RelOptInfo and must get
7111 * it the hard way. (In INSERT, the target relation is not scanned,
7112 * so it's not a baserel; and there are also corner cases for
7113 * updatable views where the target rel isn't a baserel.)
7114 */
7115 if (rti < root->simple_rel_array_size &&
7116 root->simple_rel_array[rti] != NULL)
7117 {
7118 RelOptInfo *resultRel = root->simple_rel_array[rti];
7119
7120 fdwroutine = resultRel->fdwroutine;
7121 }
7122 else
7123 {
7124 RangeTblEntry *rte = planner_rt_fetch(rti, root);
7125
7126 if (rte->rtekind == RTE_RELATION &&
7127 rte->relkind == RELKIND_FOREIGN_TABLE)
7128 {
7129 /* Check if the access to foreign tables is restricted */
7130 if (unlikely((restrict_nonsystem_relation_kind & RESTRICT_RELKIND_FOREIGN_TABLE) != 0))
7131 {
7132 /* there must not be built-in foreign tables */
7133 Assert(rte->relid >= FirstNormalObjectId);
7134 ereport(ERROR,
7135 (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
7136 errmsg("access to non-system foreign table is restricted")));
7137 }
7138
7139 fdwroutine = GetFdwRoutineByRelId(rte->relid);
7140 }
7141 else
7142 fdwroutine = NULL;
7143 }
7144
7145 /*
7146 * MERGE is not currently supported for foreign tables. We already
7147 * checked that when the table mentioned in the query is foreign; but
7148 * we can still get here if a partitioned table has a foreign table as
7149 * partition. Disallow that now, to avoid an uglier error message
7150 * later.
7151 */
7152 if (operation == CMD_MERGE && fdwroutine != NULL)
7153 {
7154 RangeTblEntry *rte = planner_rt_fetch(rti, root);
7155
7156 ereport(ERROR,
7157 errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
7158 errmsg("cannot execute MERGE on relation \"%s\"",
7159 get_rel_name(rte->relid)),
7160 errdetail_relkind_not_supported(rte->relkind));
7161 }
7162
7163 /*
7164 * Try to modify the foreign table directly if (1) the FDW provides
7165 * callback functions needed for that and (2) there are no local
7166 * structures that need to be run for each modified row: row-level
7167 * triggers on the foreign table, stored generated columns, WITH CHECK
7168 * OPTIONs from parent views, Vars returning OLD/NEW in the RETURNING
7169 * list, or transition tables on the named relation.
7170 */
7171 direct_modify = false;
7172 if (fdwroutine != NULL &&
7173 fdwroutine->PlanDirectModify != NULL &&
7174 fdwroutine->BeginDirectModify != NULL &&
7175 fdwroutine->IterateDirectModify != NULL &&
7176 fdwroutine->EndDirectModify != NULL &&
7177 withCheckOptionLists == NIL &&
7178 !has_row_triggers(root, rti, operation) &&
7179 !has_stored_generated_columns(root, rti))
7180 {
7181 /*
7182 * returning_old_or_new and transition_tables are the same for all
7183 * result relations, respectively
7184 */
7185 if (!returning_old_or_new_valid)
7186 {
7187 returning_old_or_new =
7188 contain_vars_returning_old_or_new((Node *)
7189 root->parse->returningList);
7190 returning_old_or_new_valid = true;
7191 }
7192 if (!returning_old_or_new)
7193 {
7194 if (!transition_tables_valid)
7195 {
7196 transition_tables = has_transition_tables(root,
7197 nominalRelation,
7198 operation);
7199 transition_tables_valid = true;
7200 }
7201 if (!transition_tables)
7202 direct_modify = fdwroutine->PlanDirectModify(root, node,
7203 rti, i);
7204 }
7205 }
7206 if (direct_modify)
7207 direct_modify_plans = bms_add_member(direct_modify_plans, i);
7208
7209 if (!direct_modify &&
7210 fdwroutine != NULL &&
7211 fdwroutine->PlanForeignModify != NULL)
7212 fdw_private = fdwroutine->PlanForeignModify(root, node, rti, i);
7213 else
7214 fdw_private = NIL;
7215 fdw_private_list = lappend(fdw_private_list, fdw_private);
7216 i++;
7217 }
7218 node->fdwPrivLists = fdw_private_list;
7219 node->fdwDirectModifyPlans = direct_modify_plans;
7220
7221 return node;
7222}
7223
7224/*
7225 * is_projection_capable_path
7226 * Check whether a given Path node is able to do projection.
7227 */
7228bool
7229is_projection_capable_path(Path *path)
7230{
7231 /* Most plan types can project, so just list the ones that can't */
7232 switch (path->pathtype)
7233 {
7234 case T_Hash:
7235 case T_Material:
7236 case T_Memoize:
7237 case T_Sort:
7238 case T_IncrementalSort:
7239 case T_Unique:
7240 case T_SetOp:
7241 case T_LockRows:
7242 case T_Limit:
7243 case T_ModifyTable:
7244 case T_MergeAppend:
7245 case T_RecursiveUnion:
7246 return false;
7247 case T_CustomScan:
7248 if (castNode(CustomPath, path)->flags & CUSTOMPATH_SUPPORT_PROJECTION)
7249 return true;
7250 return false;
7251 case T_Append:
7252
7253 /*
7254 * Append can't project, but if an AppendPath is being used to
7255 * represent a dummy path, what will actually be generated is a
7256 * Result which can project.
7257 */
7258 return IS_DUMMY_APPEND(path);
7259 case T_ProjectSet:
7260
7261 /*
7262 * Although ProjectSet certainly projects, say "no" because we
7263 * don't want the planner to randomly replace its tlist with
7264 * something else; the SRFs have to stay at top level. This might
7265 * get relaxed later.
7266 */
7267 return false;
7268 default:
7269 break;
7270 }
7271 return true;
7272}
7273
7274/*
7275 * is_projection_capable_plan
7276 * Check whether a given Plan node is able to do projection.
7277 */
7278bool
7279is_projection_capable_plan(Plan *plan)
7280{
7281 /* Most plan types can project, so just list the ones that can't */
7282 switch (nodeTag(plan))
7283 {
7284 case T_Hash:
7285 case T_Material:
7286 case T_Memoize:
7287 case T_Sort:
7288 case T_Unique:
7289 case T_SetOp:
7290 case T_LockRows:
7291 case T_Limit:
7292 case T_ModifyTable:
7293 case T_Append:
7294 case T_MergeAppend:
7295 case T_RecursiveUnion:
7296 return false;
7297 case T_CustomScan:
7298 if (((CustomScan *) plan)->flags & CUSTOMPATH_SUPPORT_PROJECTION)
7299 return true;
7300 return false;
7301 case T_ProjectSet:
7302
7303 /*
7304 * Although ProjectSet certainly projects, say "no" because we
7305 * don't want the planner to randomly replace its tlist with
7306 * something else; the SRFs have to stay at top level. This might
7307 * get relaxed later.
7308 */
7309 return false;
7310 default:
7311 break;
7312 }
7313 return true;
7314}
sort
Datum sort(PG_FUNCTION_ARGS)
Definition _int_op.c:198
AttrNumber
int16 AttrNumber
Definition attnum.h:21
InvalidAttrNumber
#define InvalidAttrNumber
Definition attnum.h:23
bms_difference
Bitmapset * bms_difference(const Bitmapset *a, const Bitmapset *b)
Definition bitmapset.c:346
bms_is_subset
bool bms_is_subset(const Bitmapset *a, const Bitmapset *b)
Definition bitmapset.c:412
bms_free
void bms_free(Bitmapset *a)
Definition bitmapset.c:239
bms_is_member
bool bms_is_member(int x, const Bitmapset *a)
Definition bitmapset.c:510
bms_add_member
Bitmapset * bms_add_member(Bitmapset *a, int x)
Definition bitmapset.c:799
bms_union
Bitmapset * bms_union(const Bitmapset *a, const Bitmapset *b)
Definition bitmapset.c:251
bms_nonempty_difference
bool bms_nonempty_difference(const Bitmapset *a, const Bitmapset *b)
Definition bitmapset.c:634
bms_is_empty
#define bms_is_empty(a)
Definition bitmapset.h:118
PG_USED_FOR_ASSERTS_ONLY
#define PG_USED_FOR_ASSERTS_ONLY
Definition c.h:235
Assert
#define Assert(condition)
Definition c.h:885
unlikely
#define unlikely(x)
Definition c.h:424
uint32
uint32_t uint32
Definition c.h:558
Index
unsigned int Index
Definition c.h:640
OidIsValid
#define OidIsValid(objectId)
Definition c.h:800
Size
size_t Size
Definition c.h:631
contain_mutable_functions
bool contain_mutable_functions(Node *clause)
Definition clauses.c:379
is_parallel_safe
bool is_parallel_safe(PlannerInfo *root, Node *node)
Definition clauses.c:762
pull_paramids
Bitmapset * pull_paramids(Expr *expr)
Definition clauses.c:5911
CommuteOpExpr
void CommuteOpExpr(OpExpr *clause)
Definition clauses.c:2159
COMPARE_GT
@ COMPARE_GT
Definition cmptype.h:38
COMPARE_EQ
@ COMPARE_EQ
Definition cmptype.h:36
cpu_operator_cost
double cpu_operator_cost
Definition costsize.c:134
cost_material
void cost_material(Path *path, bool enabled, int input_disabled_nodes, Cost input_startup_cost, Cost input_total_cost, double tuples, int width)
Definition costsize.c:2582
cost_sort
void cost_sort(Path *path, PlannerInfo *root, List *pathkeys, int input_disabled_nodes, Cost input_cost, double tuples, int width, Cost comparison_cost, int sort_mem, double limit_tuples)
Definition costsize.c:2200
enable_material
bool enable_material
Definition costsize.c:154
cost_qual_eval_node
void cost_qual_eval_node(QualCost *cost, Node *qual, PlannerInfo *root)
Definition costsize.c:4924
cost_incremental_sort
void cost_incremental_sort(Path *path, PlannerInfo *root, List *pathkeys, int presorted_keys, int input_disabled_nodes, Cost input_startup_cost, Cost input_total_cost, double input_tuples, int width, Cost comparison_cost, int sort_mem, double limit_tuples)
Definition costsize.c:2052
enable_async_append
bool enable_async_append
Definition costsize.c:165
clamp_row_est
double clamp_row_est(double nrows)
Definition costsize.c:213
enable_partition_pruning
bool enable_partition_pruning
Definition costsize.c:163
enable_sort
bool enable_sort
Definition costsize.c:150
enable_incremental_sort
bool enable_incremental_sort
Definition costsize.c:151
create_join_plan
static Plan * create_join_plan(PlannerInfo *root, JoinPath *best_path)
Definition createplan.c:1073
use_physical_tlist
static bool use_physical_tlist(PlannerInfo *root, Path *path, int flags)
Definition createplan.c:857
make_modifytable
static ModifyTable * make_modifytable(PlannerInfo *root, Plan *subplan, CmdType operation, bool canSetTag, Index nominalRelation, Index rootRelation, List *resultRelations, List *updateColnosLists, List *withCheckOptionLists, List *returningLists, List *rowMarks, OnConflictExpr *onconflict, List *mergeActionLists, List *mergeJoinConditions, int epqParam)
Definition createplan.c:7004
create_seqscan_plan
static SeqScan * create_seqscan_plan(PlannerInfo *root, Path *best_path, List *tlist, List *scan_clauses)
Definition createplan.c:2754
make_worktablescan
static WorkTableScan * make_worktablescan(List *qptlist, List *qpqual, Index scanrelid, int wtParam)
Definition createplan.c:5783
create_merge_append_plan
static Plan * create_merge_append_plan(PlannerInfo *root, MergeAppendPath *best_path, int flags)
Definition createplan.c:1455
order_qual_clauses
static List * order_qual_clauses(PlannerInfo *root, List *clauses)
Definition createplan.c:5265
make_mergejoin
static MergeJoin * make_mergejoin(List *tlist, List *joinclauses, List *otherclauses, List *mergeclauses, Oid *mergefamilies, Oid *mergecollations, bool *mergereversals, bool *mergenullsfirst, Plan *lefttree, Plan *righttree, JoinType jointype, bool inner_unique, bool skip_mark_restore)
Definition createplan.c:6007
create_gather_merge_plan
static GatherMerge * create_gather_merge_plan(PlannerInfo *root, GatherMergePath *best_path)
Definition createplan.c:1803
create_valuesscan_plan
static ValuesScan * create_valuesscan_plan(PlannerInfo *root, Path *best_path, List *tlist, List *scan_clauses)
Definition createplan.c:3684
copy_generic_path_info
static void copy_generic_path_info(Plan *dest, Path *src)
Definition createplan.c:5359
make_windowagg
static WindowAgg * make_windowagg(List *tlist, WindowClause *wc, int partNumCols, AttrNumber *partColIdx, Oid *partOperators, Oid *partCollations, int ordNumCols, AttrNumber *ordColIdx, Oid *ordOperators, Oid *ordCollations, List *runCondition, List *qual, bool topWindow, Plan *lefttree)
Definition createplan.c:6612
make_sort_from_sortclauses
Sort * make_sort_from_sortclauses(List *sortcls, Plan *lefttree)
Definition createplan.c:6396
make_bitmap_or
static BitmapOr * make_bitmap_or(List *bitmapplans)
Definition createplan.c:5913
create_hashjoin_plan
static HashJoin * create_hashjoin_plan(PlannerInfo *root, HashPath *best_path)
Definition createplan.c:4692
make_seqscan
static SeqScan * make_seqscan(List *qptlist, List *qpqual, Index scanrelid)
Definition createplan.c:5488
create_tablefuncscan_plan
static TableFuncScan * create_tablefuncscan_plan(PlannerInfo *root, Path *best_path, List *tlist, List *scan_clauses)
Definition createplan.c:3641
create_customscan_plan
static CustomScan * create_customscan_plan(PlannerInfo *root, CustomPath *best_path, List *tlist, List *scan_clauses)
Definition createplan.c:4115
fix_indexqual_operand
static Node * fix_indexqual_operand(Node *node, IndexOptInfo *index, int indexcol)
Definition createplan.c:5108
fix_indexqual_references
static void fix_indexqual_references(PlannerInfo *root, IndexPath *index_path, List **stripped_indexquals_p, List **fixed_indexquals_p)
Definition createplan.c:4966
fix_indexorderby_references
static List * fix_indexorderby_references(PlannerInfo *root, IndexPath *index_path)
Definition createplan.c:5007
remap_groupColIdx
static AttrNumber * remap_groupColIdx(PlannerInfo *root, List *groupClause)
Definition createplan.c:2202
create_append_plan
static Plan * create_append_plan(PlannerInfo *root, AppendPath *best_path, int flags)
Definition createplan.c:1208
bitmap_subplan_mark_shared
static void bitmap_subplan_mark_shared(Plan *plan)
Definition createplan.c:5458
create_unique_plan
static Unique * create_unique_plan(PlannerInfo *root, UniquePath *best_path, int flags)
Definition createplan.c:2120
make_one_row_result
static Result * make_one_row_result(List *tlist, Node *resconstantqual, RelOptInfo *rel)
Definition createplan.c:6961
make_tidscan
static TidScan * make_tidscan(List *qptlist, List *qpqual, Index scanrelid, List *tidquals)
Definition createplan.c:5625
create_mergejoin_plan
static MergeJoin * create_mergejoin_plan(PlannerInfo *root, MergePath *best_path)
Definition createplan.c:4338
create_plan_recurse
static Plan * create_plan_recurse(PlannerInfo *root, Path *best_path, int flags)
Definition createplan.c:390
label_sort_with_costsize
static void label_sort_with_costsize(PlannerInfo *root, Sort *plan, double limit_tuples)
Definition createplan.c:5398
create_foreignscan_plan
static ForeignScan * create_foreignscan_plan(PlannerInfo *root, ForeignPath *best_path, List *tlist, List *scan_clauses)
Definition createplan.c:3960
create_bitmap_scan_plan
static BitmapHeapScan * create_bitmap_scan_plan(PlannerInfo *root, BitmapHeapPath *best_path, List *tlist, List *scan_clauses)
Definition createplan.c:3039
make_incrementalsort
static IncrementalSort * make_incrementalsort(Plan *lefttree, int numCols, int nPresortedCols, AttrNumber *sortColIdx, Oid *sortOperators, Oid *collations, bool *nullsFirst)
Definition createplan.c:6079
create_group_result_plan
static Result * create_group_result_plan(PlannerInfo *root, GroupResultPath *best_path)
Definition createplan.c:1632
create_limit_plan
static Limit * create_limit_plan(PlannerInfo *root, LimitPath *best_path, int flags)
Definition createplan.c:2693
make_unique_from_pathkeys
static Unique * make_unique_from_pathkeys(Plan *lefttree, List *pathkeys, int numCols, Relids relids)
Definition createplan.c:6683
create_agg_plan
static Agg * create_agg_plan(PlannerInfo *root, AggPath *best_path)
Definition createplan.c:2156
is_projection_capable_path
bool is_projection_capable_path(Path *path)
Definition createplan.c:7229
make_ctescan
static CteScan * make_ctescan(List *qptlist, List *qpqual, Index scanrelid, int ctePlanId, int cteParam)
Definition createplan.c:5742
create_tidscan_plan
static TidScan * create_tidscan_plan(PlannerInfo *root, TidPath *best_path, List *tlist, List *scan_clauses)
Definition createplan.c:3377
make_tidrangescan
static TidRangeScan * make_tidrangescan(List *qptlist, List *qpqual, Index scanrelid, List *tidrangequals)
Definition createplan.c:5644
create_bitmap_subplan
static Plan * create_bitmap_subplan(PlannerInfo *root, Path *bitmapqual, List **qual, List **indexqual, List **indexECs)
Definition createplan.c:3169
make_recursive_union
static RecursiveUnion * make_recursive_union(List *tlist, Plan *lefttree, Plan *righttree, int wtParam, List *distinctList, Cardinality numGroups)
Definition createplan.c:5842
fix_indexqual_clause
static Node * fix_indexqual_clause(PlannerInfo *root, IndexOptInfo *index, int indexcol, Node *clause, List *indexcolnos)
Definition createplan.c:5036
create_worktablescan_plan
static WorkTableScan * create_worktablescan_plan(PlannerInfo *root, Path *best_path, List *tlist, List *scan_clauses)
Definition createplan.c:3900
create_gating_plan
static Plan * create_gating_plan(PlannerInfo *root, Path *path, Plan *plan, List *gating_quals)
Definition createplan.c:1014
make_memoize
static Memoize * make_memoize(Plan *lefttree, Oid *hashoperators, Oid *collations, List *param_exprs, bool singlerow, bool binary_mode, uint32 est_entries, Bitmapset *keyparamids, Cardinality est_calls, Cardinality est_unique_keys, double est_hit_ratio)
Definition createplan.c:6552
create_functionscan_plan
static FunctionScan * create_functionscan_plan(PlannerInfo *root, Path *best_path, List *tlist, List *scan_clauses)
Definition createplan.c:3598
create_resultscan_plan
static Result * create_resultscan_plan(PlannerInfo *root, Path *best_path, List *tlist, List *scan_clauses)
Definition createplan.c:3862
make_bitmap_heapscan
static BitmapHeapScan * make_bitmap_heapscan(List *qptlist, List *qpqual, Plan *lefttree, List *bitmapqualorig, Index scanrelid)
Definition createplan.c:5605
replace_nestloop_params_mutator
static Node * replace_nestloop_params_mutator(Node *node, PlannerInfo *root)
Definition createplan.c:4888
create_setop_plan
static SetOp * create_setop_plan(PlannerInfo *root, SetOpPath *best_path, int flags)
Definition createplan.c:2562
is_projection_capable_plan
bool is_projection_capable_plan(Plan *plan)
Definition createplan.c:7279
create_ctescan_plan
static CteScan * create_ctescan_plan(PlannerInfo *root, Path *best_path, List *tlist, List *scan_clauses)
Definition createplan.c:3728
create_sort_plan
static Sort * create_sort_plan(PlannerInfo *root, SortPath *best_path, int flags)
Definition createplan.c:2020
CP_SMALL_TLIST
#define CP_SMALL_TLIST
Definition createplan.c:70
make_project_set
static ProjectSet * make_project_set(List *tlist, Plan *subplan)
Definition createplan.c:6985
make_sort_from_pathkeys
static Sort * make_sort_from_pathkeys(Plan *lefttree, List *pathkeys, Relids relids)
Definition createplan.c:6327
make_hashjoin
static HashJoin * make_hashjoin(List *tlist, List *joinclauses, List *otherclauses, List *hashclauses, List *hashoperators, List *hashcollations, List *hashkeys, Plan *lefttree, Plan *righttree, JoinType jointype, bool inner_unique)
Definition createplan.c:5953
make_gather
static Gather * make_gather(List *qptlist, List *qpqual, int nworkers, int rescan_param, bool single_copy, Plan *subplan)
Definition createplan.c:6790
create_gather_plan
static Gather * create_gather_plan(PlannerInfo *root, GatherPath *best_path)
Definition createplan.c:1765
make_sort
static Sort * make_sort(Plan *lefttree, int numCols, AttrNumber *sortColIdx, Oid *sortOperators, Oid *collations, bool *nullsFirst)
Definition createplan.c:6048
make_limit
Limit * make_limit(Plan *lefttree, Node *limitOffset, Node *limitCount, LimitOption limitOption, int uniqNumCols, AttrNumber *uniqColIdx, Oid *uniqOperators, Oid *uniqCollations)
Definition createplan.c:6901
create_project_set_plan
static ProjectSet * create_project_set_plan(PlannerInfo *root, ProjectSetPath *best_path)
Definition createplan.c:1657
label_incrementalsort_with_costsize
static void label_incrementalsort_with_costsize(PlannerInfo *root, IncrementalSort *plan, List *pathkeys, double limit_tuples)
Definition createplan.c:5426
make_setop
static SetOp * make_setop(SetOpCmd cmd, SetOpStrategy strategy, List *tlist, Plan *lefttree, Plan *righttree, List *groupList, Cardinality numGroups)
Definition createplan.c:6819
make_foreignscan
ForeignScan * make_foreignscan(List *qptlist, List *qpqual, Index scanrelid, List *fdw_exprs, List *fdw_private, List *fdw_scan_tlist, List *fdw_recheck_quals, Plan *outer_plan)
Definition createplan.c:5802
create_group_plan
static Group * create_group_plan(PlannerInfo *root, GroupPath *best_path)
Definition createplan.c:2081
create_modifytable_plan
static ModifyTable * create_modifytable_plan(PlannerInfo *root, ModifyTablePath *best_path)
Definition createplan.c:2653
create_minmaxagg_plan
static Result * create_minmaxagg_plan(PlannerInfo *root, MinMaxAggPath *best_path)
Definition createplan.c:2398
create_lockrows_plan
static LockRows * create_lockrows_plan(PlannerInfo *root, LockRowsPath *best_path, int flags)
Definition createplan.c:2630
create_material_plan
static Material * create_material_plan(PlannerInfo *root, MaterialPath *best_path, int flags)
Definition createplan.c:1683
get_gating_quals
static List * get_gating_quals(PlannerInfo *root, List *quals)
Definition createplan.c:994
create_scan_plan
static Plan * create_scan_plan(PlannerInfo *root, Path *best_path, int flags)
Definition createplan.c:551
make_group
static Group * make_group(List *tlist, List *qual, int numGroupCols, AttrNumber *grpColIdx, Oid *grpOperators, Oid *grpCollations, Plan *lefttree)
Definition createplan.c:6652
make_lockrows
static LockRows * make_lockrows(Plan *lefttree, List *rowMarks, int epqParam)
Definition createplan.c:6880
create_incrementalsort_plan
static IncrementalSort * create_incrementalsort_plan(PlannerInfo *root, IncrementalSortPath *best_path, int flags)
Definition createplan.c:2054
create_namedtuplestorescan_plan
static NamedTuplestoreScan * create_namedtuplestorescan_plan(PlannerInfo *root, Path *best_path, List *tlist, List *scan_clauses)
Definition createplan.c:3823
create_projection_plan
static Plan * create_projection_plan(PlannerInfo *root, ProjectionPath *best_path, int flags)
Definition createplan.c:1859
make_indexonlyscan
static IndexOnlyScan * make_indexonlyscan(List *qptlist, List *qpqual, Index scanrelid, Oid indexid, List *indexqual, List *recheckqual, List *indexorderby, List *indextlist, ScanDirection indexscandir)
Definition createplan.c:5555
build_path_tlist
static List * build_path_tlist(PlannerInfo *root, Path *path)
Definition createplan.c:817
make_indexscan
static IndexScan * make_indexscan(List *qptlist, List *qpqual, Index scanrelid, Oid indexid, List *indexqual, List *indexqualorig, List *indexorderby, List *indexorderbyorig, List *indexorderbyops, ScanDirection indexscandir)
Definition createplan.c:5524
make_functionscan
static FunctionScan * make_functionscan(List *qptlist, List *qpqual, Index scanrelid, List *functions, bool funcordinality)
Definition createplan.c:5683
make_tablefuncscan
static TableFuncScan * make_tablefuncscan(List *qptlist, List *qpqual, Index scanrelid, TableFunc *tablefunc)
Definition createplan.c:5704
create_subqueryscan_plan
static SubqueryScan * create_subqueryscan_plan(PlannerInfo *root, SubqueryScanPath *best_path, List *tlist, List *scan_clauses)
Definition createplan.c:3539
inject_projection_plan
static Plan * inject_projection_plan(Plan *subplan, List *tlist, bool parallel_safe)
Definition createplan.c:1960
create_tidrangescan_plan
static TidRangeScan * create_tidrangescan_plan(PlannerInfo *root, TidRangePath *best_path, List *tlist, List *scan_clauses)
Definition createplan.c:3474
get_switched_clauses
static List * get_switched_clauses(List *clauses, Relids outerrelids)
Definition createplan.c:5188
copy_plan_costsize
static void copy_plan_costsize(Plan *dest, Plan *src)
Definition createplan.c:5375
make_valuesscan
static ValuesScan * make_valuesscan(List *qptlist, List *qpqual, Index scanrelid, List *values_lists)
Definition createplan.c:5723
materialize_finished_plan
Plan * materialize_finished_plan(Plan *subplan)
Definition createplan.c:6508
make_samplescan
static SampleScan * make_samplescan(List *qptlist, List *qpqual, Index scanrelid, TableSampleClause *tsc)
Definition createplan.c:5505
create_nestloop_plan
static NestLoop * create_nestloop_plan(PlannerInfo *root, NestPath *best_path)
Definition createplan.c:4186
create_memoize_plan
static Memoize * create_memoize_plan(PlannerInfo *root, MemoizePath *best_path, int flags)
Definition createplan.c:1711
make_gating_result
static Result * make_gating_result(List *tlist, Node *resconstantqual, Plan *subplan)
Definition createplan.c:6930
make_agg
Agg * make_agg(List *tlist, List *qual, AggStrategy aggstrategy, AggSplit aggsplit, int numGroupCols, AttrNumber *grpColIdx, Oid *grpOperators, Oid *grpCollations, List *groupingSets, List *chain, Cardinality numGroups, Size transitionSpace, Plan *lefttree)
Definition createplan.c:6582
CP_EXACT_TLIST
#define CP_EXACT_TLIST
Definition createplan.c:69
make_namedtuplestorescan
static NamedTuplestoreScan * make_namedtuplestorescan(List *qptlist, List *qpqual, Index scanrelid, char *enrname)
Definition createplan.c:5763
mark_async_capable_plan
static bool mark_async_capable_plan(Plan *plan, Path *path)
Definition createplan.c:1132
make_material
static Material * make_material(Plan *lefttree)
Definition createplan.c:6486
change_plan_targetlist
Plan * change_plan_targetlist(Plan *subplan, List *tlist, bool tlist_parallel_safe)
Definition createplan.c:1992
make_nestloop
static NestLoop * make_nestloop(List *tlist, List *joinclauses, List *otherclauses, List *nestParams, Plan *lefttree, Plan *righttree, JoinType jointype, bool inner_unique)
Definition createplan.c:5928
make_bitmap_indexscan
static BitmapIndexScan * make_bitmap_indexscan(Index scanrelid, Oid indexid, List *indexqual, List *indexqualorig)
Definition createplan.c:5584
make_subqueryscan
static SubqueryScan * make_subqueryscan(List *qptlist, List *qpqual, Index scanrelid, Plan *subplan)
Definition createplan.c:5663
make_hash
static Hash * make_hash(Plan *lefttree, List *hashkeys, Oid skewTable, AttrNumber skewColumn, bool skewInherit)
Definition createplan.c:5984
create_windowagg_plan
static WindowAgg * create_windowagg_plan(PlannerInfo *root, WindowAggPath *best_path)
Definition createplan.c:2467
replace_nestloop_params
static Node * replace_nestloop_params(PlannerInfo *root, Node *expr)
Definition createplan.c:4881
CP_LABEL_TLIST
#define CP_LABEL_TLIST
Definition createplan.c:71
make_bitmap_and
static BitmapAnd * make_bitmap_and(List *bitmapplans)
Definition createplan.c:5898
create_groupingsets_plan
static Plan * create_groupingsets_plan(PlannerInfo *root, GroupingSetsPath *best_path)
Definition createplan.c:2240
create_recursiveunion_plan
static RecursiveUnion * create_recursiveunion_plan(PlannerInfo *root, RecursiveUnionPath *best_path)
Definition createplan.c:2598
make_sort_from_groupcols
static Sort * make_sort_from_groupcols(List *groupcls, AttrNumber *grpColIdx, Plan *lefttree)
Definition createplan.c:6445
CP_IGNORE_TLIST
#define CP_IGNORE_TLIST
Definition createplan.c:72
create_indexscan_plan
static Scan * create_indexscan_plan(PlannerInfo *root, IndexPath *best_path, List *tlist, List *scan_clauses, bool indexonly)
Definition createplan.c:2843
prepare_sort_from_pathkeys
static Plan * prepare_sort_from_pathkeys(Plan *lefttree, List *pathkeys, Relids relids, const AttrNumber *reqColIdx, bool adjust_tlist_in_place, int *p_numsortkeys, AttrNumber **p_sortColIdx, Oid **p_sortOperators, Oid **p_collations, bool **p_nullsFirst)
Definition createplan.c:6145
make_incrementalsort_from_pathkeys
static IncrementalSort * make_incrementalsort_from_pathkeys(Plan *lefttree, List *pathkeys, Relids relids, int nPresortedCols)
Definition createplan.c:6362
create_samplescan_plan
static SampleScan * create_samplescan_plan(PlannerInfo *root, Path *best_path, List *tlist, List *scan_clauses)
Definition createplan.c:2792
create_plan
Plan * create_plan(PlannerInfo *root, Path *best_path)
Definition createplan.c:339
arg
Datum arg
Definition elog.c:1322
errcode
int errcode(int sqlerrcode)
Definition elog.c:874
errmsg
int errmsg(const char *fmt,...)
Definition elog.c:1093
ERROR
#define ERROR
Definition elog.h:39
elog
#define elog(elevel,...)
Definition elog.h:226
ereport
#define ereport(elevel,...)
Definition elog.h:150
equal
bool equal(const void *a, const void *b)
Definition equalfuncs.c:223
is_redundant_with_indexclauses
bool is_redundant_with_indexclauses(RestrictInfo *rinfo, List *indexclauses)
Definition equivclass.c:3576
find_ec_member_matching_expr
EquivalenceMember * find_ec_member_matching_expr(EquivalenceClass *ec, Expr *expr, Relids relids)
Definition equivclass.c:916
find_computable_ec_member
EquivalenceMember * find_computable_ec_member(PlannerInfo *root, EquivalenceClass *ec, List *exprs, Relids relids, bool require_parallel_safe)
Definition equivclass.c:991
is_redundant_derived_clause
bool is_redundant_derived_clause(RestrictInfo *rinfo, List *clauselist)
Definition equivclass.c:3549
CUSTOMPATH_SUPPORT_PROJECTION
#define CUSTOMPATH_SUPPORT_PROJECTION
Definition extensible.h:86
palloc_array
#define palloc_array(type, count)
Definition fe_memutils.h:76
palloc0_array
#define palloc0_array(type, count)
Definition fe_memutils.h:77
GetFdwRoutineByRelId
FdwRoutine * GetFdwRoutineByRelId(Oid relid)
Definition foreign.c:420
work_mem
int work_mem
Definition globals.c:131
parse
void parse(int)
Definition parse.c:49
nitems
#define nitems(x)
Definition indent.h:31
strip_phvs_in_index_operand
Node * strip_phvs_in_index_operand(Node *operand)
Definition indxpath.c:4449
true
return true
Definition isn.c:130
j
int j
Definition isn.c:78
i
int i
Definition isn.c:77
list_difference
List * list_difference(const List *list1, const List *list2)
Definition list.c:1237
lappend
List * lappend(List *list, void *datum)
Definition list.c:339
list_difference_ptr
List * list_difference_ptr(const List *list1, const List *list2)
Definition list.c:1263
list_concat
List * list_concat(List *list1, const List *list2)
Definition list.c:561
list_concat_copy
List * list_concat_copy(const List *list1, const List *list2)
Definition list.c:598
list_copy
List * list_copy(const List *oldlist)
Definition list.c:1573
lappend_oid
List * lappend_oid(List *list, Oid datum)
Definition list.c:375
list_member_ptr
bool list_member_ptr(const List *list, const void *datum)
Definition list.c:682
list_member
bool list_member(const List *list, const void *datum)
Definition list.c:661
list_copy_head
List * list_copy_head(const List *oldlist, int len)
Definition list.c:1593
list_concat_unique
List * list_concat_unique(List *list1, const List *list2)
Definition list.c:1405
LCS_NONE
@ LCS_NONE
Definition lockoptions.h:23
get_rel_name
char * get_rel_name(Oid relid)
Definition lsyscache.c:2078
get_opfamily_member_for_cmptype
Oid get_opfamily_member_for_cmptype(Oid opfamily, Oid lefttype, Oid righttype, CompareType cmptype)
Definition lsyscache.c:197
lca
Datum lca(PG_FUNCTION_ARGS)
Definition ltree_op.c:563
subpath
Datum subpath(PG_FUNCTION_ARGS)
Definition ltree_op.c:311
make_orclause
Expr * make_orclause(List *orclauses)
Definition makefuncs.c:743
make_ands_explicit
Expr * make_ands_explicit(List *andclauses)
Definition makefuncs.c:799
makeVar
Var * makeVar(int varno, AttrNumber varattno, Oid vartype, int32 vartypmod, Oid varcollid, Index varlevelsup)
Definition makefuncs.c:66
makeBoolConst
Node * makeBoolConst(bool value, bool isnull)
Definition makefuncs.c:408
makeTargetEntry
TargetEntry * makeTargetEntry(Expr *expr, AttrNumber resno, char *resname, bool resjunk)
Definition makefuncs.c:289
palloc0
void * palloc0(Size size)
Definition mcxt.c:1417
palloc
void * palloc(Size size)
Definition mcxt.c:1387
exprType
Oid exprType(const Node *expr)
Definition nodeFuncs.c:42
exprCollation
Oid exprCollation(const Node *expr)
Definition nodeFuncs.c:821
expression_tree_mutator
#define expression_tree_mutator(n, m, c)
Definition nodeFuncs.h:155
is_opclause
static bool is_opclause(const void *clause)
Definition nodeFuncs.h:76
SetOpCmd
SetOpCmd
Definition nodes.h:407
SetOpStrategy
SetOpStrategy
Definition nodes.h:415
SETOP_HASHED
@ SETOP_HASHED
Definition nodes.h:417
IsA
#define IsA(nodeptr, _type_)
Definition nodes.h:164
copyObject
#define copyObject(obj)
Definition nodes.h:232
Cost
double Cost
Definition nodes.h:261
nodeTag
#define nodeTag(nodeptr)
Definition nodes.h:139
IS_OUTER_JOIN
#define IS_OUTER_JOIN(jointype)
Definition nodes.h:348
ONCONFLICT_NONE
@ ONCONFLICT_NONE
Definition nodes.h:428
Cardinality
double Cardinality
Definition nodes.h:262
CmdType
CmdType
Definition nodes.h:273
CMD_MERGE
@ CMD_MERGE
Definition nodes.h:279
CMD_UPDATE
@ CMD_UPDATE
Definition nodes.h:276
CMD_SELECT
@ CMD_SELECT
Definition nodes.h:275
AggStrategy
AggStrategy
Definition nodes.h:363
AGG_SORTED
@ AGG_SORTED
Definition nodes.h:365
AGG_HASHED
@ AGG_HASHED
Definition nodes.h:366
AGG_PLAIN
@ AGG_PLAIN
Definition nodes.h:364
AggSplit
AggSplit
Definition nodes.h:385
AGGSPLIT_SIMPLE
@ AGGSPLIT_SIMPLE
Definition nodes.h:387
LimitOption
LimitOption
Definition nodes.h:441
LIMIT_OPTION_WITH_TIES
@ LIMIT_OPTION_WITH_TIES
Definition nodes.h:443
makeNode
#define makeNode(_type_)
Definition nodes.h:161
castNode
#define castNode(_type_, nodeptr)
Definition nodes.h:182
JoinType
JoinType
Definition nodes.h:298
process_subquery_nestloop_params
void process_subquery_nestloop_params(PlannerInfo *root, List *subplan_params)
Definition paramassign.c:527
identify_current_nestloop_params
List * identify_current_nestloop_params(PlannerInfo *root, Relids leftrelids, Relids outerrelids)
Definition paramassign.c:622
replace_nestloop_param_placeholdervar
Param * replace_nestloop_param_placeholdervar(PlannerInfo *root, PlaceHolderVar *phv)
Definition paramassign.c:463
assign_special_exec_param
int assign_special_exec_param(PlannerInfo *root)
Definition paramassign.c:754
replace_nestloop_param_var
Param * replace_nestloop_param_var(PlannerInfo *root, Var *var)
Definition paramassign.c:414
parse_clause.h
get_tle_by_resno
TargetEntry * get_tle_by_resno(List *tlist, AttrNumber resno)
Definition parse_relation.c:3533
RTE_CTE
@ RTE_CTE
Definition parsenodes.h:1076
RTE_NAMEDTUPLESTORE
@ RTE_NAMEDTUPLESTORE
Definition parsenodes.h:1077
RTE_VALUES
@ RTE_VALUES
Definition parsenodes.h:1075
RTE_SUBQUERY
@ RTE_SUBQUERY
Definition parsenodes.h:1071
RTE_RESULT
@ RTE_RESULT
Definition parsenodes.h:1078
RTE_FUNCTION
@ RTE_FUNCTION
Definition parsenodes.h:1073
RTE_TABLEFUNC
@ RTE_TABLEFUNC
Definition parsenodes.h:1074
RTE_RELATION
@ RTE_RELATION
Definition parsenodes.h:1070
make_partition_pruneinfo
int make_partition_pruneinfo(PlannerInfo *root, RelOptInfo *parentrel, List *subpaths, List *prunequal)
Definition partprune.c:224
pathkeys_count_contained_in
bool pathkeys_count_contained_in(List *keys1, List *keys2, int *n_common)
Definition pathkeys.c:558
pathkeys_contained_in
bool pathkeys_contained_in(List *keys1, List *keys2)
Definition pathkeys.c:343
reparameterize_path_by_child
Path * reparameterize_path_by_child(PlannerInfo *root, Path *path, RelOptInfo *child_rel)
Definition pathnode.c:4039
IS_DUMMY_APPEND
#define IS_DUMMY_APPEND(p)
Definition pathnodes.h:2277
IS_JOIN_REL
#define IS_JOIN_REL(rel)
Definition pathnodes.h:982
PATH_REQ_OUTER
#define PATH_REQ_OUTER(path)
Definition pathnodes.h:2001
planner_rt_fetch
#define planner_rt_fetch(rti, root)
Definition pathnodes.h:692
RELOPT_BASEREL
@ RELOPT_BASEREL
Definition pathnodes.h:965
RELOPT_UPPER_REL
@ RELOPT_UPPER_REL
Definition pathnodes.h:969
IS_OTHER_REL
#define IS_OTHER_REL(rel)
Definition pathnodes.h:992
IS_UPPER_REL
#define IS_UPPER_REL(rel)
Definition pathnodes.h:987
errdetail_relkind_not_supported
int errdetail_relkind_not_supported(char relkind)
Definition pg_class.c:24
pg_class.h
lfirst
#define lfirst(lc)
Definition pg_list.h:172
lfirst_node
#define lfirst_node(type, lc)
Definition pg_list.h:176
list_length
static int list_length(const List *l)
Definition pg_list.h:152
NIL
#define NIL
Definition pg_list.h:68
forboth
#define forboth(cell1, list1, cell2, list2)
Definition pg_list.h:518
lfirst_int
#define lfirst_int(lc)
Definition pg_list.h:173
list_make1
#define list_make1(x1)
Definition pg_list.h:212
linitial_int
#define linitial_int(l)
Definition pg_list.h:179
for_each_from
#define for_each_from(cell, lst, N)
Definition pg_list.h:414
linitial
#define linitial(l)
Definition pg_list.h:178
lsecond
#define lsecond(l)
Definition pg_list.h:183
list_head
static ListCell * list_head(const List *l)
Definition pg_list.h:128
lnext
static ListCell * lnext(const List *l, const ListCell *c)
Definition pg_list.h:343
lfirst_oid
#define lfirst_oid(lc)
Definition pg_list.h:174
list_nth_int
static int list_nth_int(const List *list, int n)
Definition pg_list.h:310
plan
#define plan(x)
Definition pg_regress.c:161
find_placeholder_info
PlaceHolderInfo * find_placeholder_info(PlannerInfo *root, PlaceHolderVar *phv)
Definition placeholder.c:83
has_stored_generated_columns
bool has_stored_generated_columns(PlannerInfo *root, Index rti)
Definition plancat.c:2624
has_row_triggers
bool has_row_triggers(PlannerInfo *root, Index rti, CmdType event)
Definition plancat.c:2520
build_physical_tlist
List * build_physical_tlist(PlannerInfo *root, RelOptInfo *rel)
Definition plancat.c:2053
has_transition_tables
bool has_transition_tables(PlannerInfo *root, Index rti, CmdType event)
Definition plancat.c:2570
infer_arbiter_indexes
List * infer_arbiter_indexes(PlannerInfo *root)
Definition plancat.c:816
SUBQUERY_SCAN_UNKNOWN
@ SUBQUERY_SCAN_UNKNOWN
Definition plannodes.h:766
RESULT_TYPE_UPPER
@ RESULT_TYPE_UPPER
Definition plannodes.h:280
RESULT_TYPE_SCAN
@ RESULT_TYPE_SCAN
Definition plannodes.h:278
RESULT_TYPE_GATING
@ RESULT_TYPE_GATING
Definition plannodes.h:277
RESULT_TYPE_MINMAX
@ RESULT_TYPE_MINMAX
Definition plannodes.h:281
RESULT_TYPE_JOIN
@ RESULT_TYPE_JOIN
Definition plannodes.h:279
restrict_nonsystem_relation_kind
int restrict_nonsystem_relation_kind
Definition postgres.c:107
InvalidOid
#define InvalidOid
Definition postgres_ext.h:37
Oid
unsigned int Oid
Definition postgres_ext.h:32
predicate_implied_by
bool predicate_implied_by(List *predicate_list, List *clause_list, bool weak)
Definition predtest.c:153
fb
static int fb(int x)
Definition preproc-init.c:92
extract_update_targetlist_colnos
List * extract_update_targetlist_colnos(List *tlist)
Definition preptlist.c:348
IS_SPECIAL_VARNO
#define IS_SPECIAL_VARNO(varno)
Definition primnodes.h:248
INDEX_VAR
#define INDEX_VAR
Definition primnodes.h:245
root
tree ctl root
Definition radixtree.h:1857
functions
static const struct fns functions
Definition regcomp.c:358
extract_actual_clauses
List * extract_actual_clauses(List *restrictinfo_list, bool pseudoconstant)
Definition restrictinfo.c:485
extract_actual_join_clauses
void extract_actual_join_clauses(List *restrictinfo_list, Relids joinrelids, List **joinquals, List **otherquals)
Definition restrictinfo.c:513
get_actual_clauses
List * get_actual_clauses(List *restrictinfo_list)
Definition restrictinfo.c:460
ScanDirection
ScanDirection
Definition sdir.h:25
BackwardScanDirection
@ BackwardScanDirection
Definition sdir.h:26
ForwardScanDirection
@ ForwardScanDirection
Definition sdir.h:28
trivial_subqueryscan
bool trivial_subqueryscan(SubqueryScan *plan)
Definition setrefs.c:1528
check_stack_depth
void check_stack_depth(void)
Definition stack_depth.c:95
Agg::aggsplit
AggSplit aggsplit
Definition plannodes.h:1215
Agg::chain
List * chain
Definition plannodes.h:1242
Agg::groupingSets
List * groupingSets
Definition plannodes.h:1239
Agg::aggParams
Bitmapset * aggParams
Definition plannodes.h:1234
Agg::numGroups
Cardinality numGroups
Definition plannodes.h:1228
Agg::plan
Plan plan
Definition plannodes.h:1209
Agg::numCols
int numCols
Definition plannodes.h:1218
Agg::transitionSpace
uint64 transitionSpace
Definition plannodes.h:1231
Agg::aggstrategy
AggStrategy aggstrategy
Definition plannodes.h:1212
BitmapAnd::plan
Plan plan
Definition plannodes.h:510
BitmapAnd::bitmapplans
List * bitmapplans
Definition plannodes.h:511
BitmapHeapScan::bitmapqualorig
List * bitmapqualorig
Definition plannodes.h:712
BitmapIndexScan::indexqualorig
List * indexqualorig
Definition plannodes.h:696
BitmapOr::bitmapplans
List * bitmapplans
Definition plannodes.h:526
BitmapOr::plan
Plan plan
Definition plannodes.h:524
CteScan::ctePlanId
int ctePlanId
Definition plannodes.h:821
CteScan::cteParam
int cteParam
Definition plannodes.h:823
CteScan::scan
Scan scan
Definition plannodes.h:819
CustomScan::custom_relids
Bitmapset * custom_relids
Definition plannodes.h:944
CustomScan::custom_exprs
List * custom_exprs
Definition plannodes.h:938
CustomScan::methods
const struct CustomScanMethods * methods
Definition plannodes.h:951
FdwRoutine::BeginDirectModify
BeginDirectModify_function BeginDirectModify
Definition fdwapi.h:242
FdwRoutine::PlanForeignModify
PlanForeignModify_function PlanForeignModify
Definition fdwapi.h:230
FdwRoutine::PlanDirectModify
PlanDirectModify_function PlanDirectModify
Definition fdwapi.h:241
FdwRoutine::IterateDirectModify
IterateDirectModify_function IterateDirectModify
Definition fdwapi.h:243
FdwRoutine::EndDirectModify
EndDirectModify_function EndDirectModify
Definition fdwapi.h:244
FdwRoutine::IsForeignPathAsyncCapable
IsForeignPathAsyncCapable_function IsForeignPathAsyncCapable
Definition fdwapi.h:277
ForeignScan::checkAsUser
Oid checkAsUser
Definition plannodes.h:896
ForeignScan::operation
CmdType operation
Definition plannodes.h:892
ForeignScan::fdw_exprs
List * fdw_exprs
Definition plannodes.h:900
ForeignScan::fsSystemCol
bool fsSystemCol
Definition plannodes.h:912
ForeignScan::fs_relids
Bitmapset * fs_relids
Definition plannodes.h:908
ForeignScan::fdw_private
List * fdw_private
Definition plannodes.h:902
ForeignScan::fs_base_relids
Bitmapset * fs_base_relids
Definition plannodes.h:910
ForeignScan::resultRelation
Index resultRelation
Definition plannodes.h:894
ForeignScan::fdw_recheck_quals
List * fdw_recheck_quals
Definition plannodes.h:906
ForeignScan::fdw_scan_tlist
List * fdw_scan_tlist
Definition plannodes.h:904
FunctionScan::functions
List * functions
Definition plannodes.h:786
FunctionScan::funcordinality
bool funcordinality
Definition plannodes.h:788
Gather::num_workers
int num_workers
Definition plannodes.h:1358
Gather::invisible
bool invisible
Definition plannodes.h:1364
Gather::initParam
Bitmapset * initParam
Definition plannodes.h:1370
Gather::single_copy
bool single_copy
Definition plannodes.h:1362
Gather::plan
Plan plan
Definition plannodes.h:1356
Gather::rescan_param
int rescan_param
Definition plannodes.h:1360
Group::numCols
int numCols
Definition plannodes.h:1183
Group::plan
Plan plan
Definition plannodes.h:1180
HashJoin::hashcollations
List * hashcollations
Definition plannodes.h:1067
HashJoin::hashclauses
List * hashclauses
Definition plannodes.h:1065
HashJoin::hashoperators
List * hashoperators
Definition plannodes.h:1066
HashJoin::join
Join join
Definition plannodes.h:1064
HashJoin::hashkeys
List * hashkeys
Definition plannodes.h:1073
Hash::skewColumn
AttrNumber skewColumn
Definition plannodes.h:1432
Hash::hashkeys
List * hashkeys
Definition plannodes.h:1428
Hash::skewTable
Oid skewTable
Definition plannodes.h:1430
Hash::skewInherit
bool skewInherit
Definition plannodes.h:1434
Hash::plan
Plan plan
Definition plannodes.h:1421
IndexOnlyScan::indexqual
List * indexqual
Definition plannodes.h:658
IndexOnlyScan::recheckqual
List * recheckqual
Definition plannodes.h:660
IndexOnlyScan::indextlist
List * indextlist
Definition plannodes.h:664
IndexOnlyScan::indexorderdir
ScanDirection indexorderdir
Definition plannodes.h:666
IndexOnlyScan::indexorderby
List * indexorderby
Definition plannodes.h:662
IndexOptInfo::indextlist
List * indextlist
Definition pathnodes.h:1398
IndexScan::indexorderby
List * indexorderby
Definition plannodes.h:612
IndexScan::indexorderbyops
List * indexorderbyops
Definition plannodes.h:616
IndexScan::indexorderdir
ScanDirection indexorderdir
Definition plannodes.h:618
IndexScan::scan
Scan scan
Definition plannodes.h:604
IndexScan::indexqualorig
List * indexqualorig
Definition plannodes.h:610
IndexScan::indexid
Oid indexid
Definition plannodes.h:606
IndexScan::indexqual
List * indexqual
Definition plannodes.h:608
IndexScan::indexorderbyorig
List * indexorderbyorig
Definition plannodes.h:614
Join::joinqual
List * joinqual
Definition plannodes.h:990
Join::jointype
JoinType jointype
Definition plannodes.h:987
Join::inner_unique
bool inner_unique
Definition plannodes.h:988
Limit::limitOption
LimitOption limitOption
Definition plannodes.h:1507
Limit::plan
Plan plan
Definition plannodes.h:1498
Limit::limitCount
Node * limitCount
Definition plannodes.h:1504
Limit::uniqNumCols
int uniqNumCols
Definition plannodes.h:1510
Limit::limitOffset
Node * limitOffset
Definition plannodes.h:1501
List
Definition pg_list.h:54
LockRows::epqParam
int epqParam
Definition plannodes.h:1486
LockRows::rowMarks
List * rowMarks
Definition plannodes.h:1484
LockRows::plan
Plan plan
Definition plannodes.h:1482
Material::plan
Plan plan
Definition plannodes.h:1082
Memoize::plan
Plan plan
Definition plannodes.h:1091
Memoize::singlerow
bool singlerow
Definition plannodes.h:1109
Memoize::est_calls
Cardinality est_calls
Definition plannodes.h:1127
Memoize::keyparamids
Bitmapset * keyparamids
Definition plannodes.h:1124
Memoize::binary_mode
bool binary_mode
Definition plannodes.h:1115
Memoize::numKeys
int numKeys
Definition plannodes.h:1094
Memoize::est_unique_keys
Cardinality est_unique_keys
Definition plannodes.h:1130
Memoize::param_exprs
List * param_exprs
Definition plannodes.h:1103
Memoize::est_hit_ratio
double est_hit_ratio
Definition plannodes.h:1133
Memoize::est_entries
uint32 est_entries
Definition plannodes.h:1121
MergeAppend::part_prune_index
int part_prune_index
Definition plannodes.h:466
MergeAppend::apprelids
Bitmapset * apprelids
Definition plannodes.h:436
MergeAppend::mergeplans
List * mergeplans
Definition plannodes.h:442
MergeAppend::child_append_relid_sets
List * child_append_relid_sets
Definition plannodes.h:439
MergeJoin::mergeclauses
List * mergeclauses
Definition plannodes.h:1041
MergeJoin::skip_mark_restore
bool skip_mark_restore
Definition plannodes.h:1038
ModifyTable::updateColnosLists
List * updateColnosLists
Definition plannodes.h:350
ModifyTable::nominalRelation
Index nominalRelation
Definition plannodes.h:344
ModifyTable::arbiterIndexes
List * arbiterIndexes
Definition plannodes.h:370
ModifyTable::onConflictCols
List * onConflictCols
Definition plannodes.h:376
ModifyTable::mergeJoinConditions
List * mergeJoinConditions
Definition plannodes.h:386
ModifyTable::returningOldAlias
char * returningOldAlias
Definition plannodes.h:354
ModifyTable::returningNewAlias
char * returningNewAlias
Definition plannodes.h:356
ModifyTable::operation
CmdType operation
Definition plannodes.h:340
ModifyTable::resultRelations
List * resultRelations
Definition plannodes.h:348
ModifyTable::fdwDirectModifyPlans
Bitmapset * fdwDirectModifyPlans
Definition plannodes.h:362
ModifyTable::onConflictSet
List * onConflictSet
Definition plannodes.h:374
ModifyTable::exclRelTlist
List * exclRelTlist
Definition plannodes.h:382
ModifyTable::mergeActionLists
List * mergeActionLists
Definition plannodes.h:384
ModifyTable::canSetTag
bool canSetTag
Definition plannodes.h:342
ModifyTable::fdwPrivLists
List * fdwPrivLists
Definition plannodes.h:360
ModifyTable::returningLists
List * returningLists
Definition plannodes.h:358
ModifyTable::withCheckOptionLists
List * withCheckOptionLists
Definition plannodes.h:352
ModifyTable::onConflictLockStrength
LockClauseStrength onConflictLockStrength
Definition plannodes.h:372
ModifyTable::rootRelation
Index rootRelation
Definition plannodes.h:346
ModifyTable::onConflictWhere
Node * onConflictWhere
Definition plannodes.h:378
ModifyTable::rowMarks
List * rowMarks
Definition plannodes.h:364
ModifyTable::onConflictAction
OnConflictAction onConflictAction
Definition plannodes.h:368
ModifyTable::exclRelRTI
Index exclRelRTI
Definition plannodes.h:380
NestLoop::nestParams
List * nestParams
Definition plannodes.h:1008
NestLoop::join
Join join
Definition plannodes.h:1006
Node
Definition nodes.h:135
OnConflictExpr::action
OnConflictAction action
Definition primnodes.h:2374
OnConflictExpr::lockStrength
LockClauseStrength lockStrength
Definition primnodes.h:2383
OnConflictExpr::onConflictSet
List * onConflictSet
Definition primnodes.h:2386
OnConflictExpr::exclRelTlist
List * exclRelTlist
Definition primnodes.h:2391
OnConflictExpr::onConflictWhere
Node * onConflictWhere
Definition primnodes.h:2389
OpExpr::opno
Oid opno
Definition primnodes.h:851
OpExpr::args
List * args
Definition primnodes.h:869
OpExpr::location
ParseLoc location
Definition primnodes.h:872
PathTarget::exprs
List * exprs
Definition pathnodes.h:1864
Path::pathtype
NodeTag pathtype
Definition pathnodes.h:1957
Path::rows
Cardinality rows
Definition pathnodes.h:1991
Path::startup_cost
Cost startup_cost
Definition pathnodes.h:1993
Path::disabled_nodes
int disabled_nodes
Definition pathnodes.h:1992
Path::total_cost
Cost total_cost
Definition pathnodes.h:1994
Path::parallel_aware
bool parallel_aware
Definition pathnodes.h:1984
Path::parallel_safe
bool parallel_safe
Definition pathnodes.h:1986
Plan::lefttree
struct Plan * lefttree
Definition plannodes.h:239
Plan::async_capable
bool async_capable
Definition plannodes.h:227
Plan::total_cost
Cost total_cost
Definition plannodes.h:205
Plan::righttree
struct Plan * righttree
Definition plannodes.h:240
Plan::startup_cost
Cost startup_cost
Definition plannodes.h:203
Plan::qual
List * qual
Definition plannodes.h:237
Plan::plan_width
int plan_width
Definition plannodes.h:213
Plan::parallel_safe
bool parallel_safe
Definition plannodes.h:221
Plan::plan_rows
Cardinality plan_rows
Definition plannodes.h:211
Plan::disabled_nodes
int disabled_nodes
Definition plannodes.h:201
Plan::targetlist
List * targetlist
Definition plannodes.h:235
Plan::initPlan
List * initPlan
Definition plannodes.h:242
PlannerInfo::parse
Query * parse
Definition pathnodes.h:309
RecursiveUnion::numGroups
Cardinality numGroups
Definition plannodes.h:497
RelOptInfo::baserestrictinfo
List * baserestrictinfo
Definition pathnodes.h:1130
RelOptInfo::subplan_params
List * subplan_params
Definition pathnodes.h:1089
RelOptInfo::useridiscurrent
bool useridiscurrent
Definition pathnodes.h:1103
RelOptInfo::relids
Relids relids
Definition pathnodes.h:1009
RelOptInfo::reltarget
struct PathTarget * reltarget
Definition pathnodes.h:1033
RelOptInfo::relid
Index relid
Definition pathnodes.h:1057
RelOptInfo::reloptkind
RelOptKind reloptkind
Definition pathnodes.h:1003
RelOptInfo::subroot
PlannerInfo * subroot
Definition pathnodes.h:1088
RelOptInfo::min_attr
AttrNumber min_attr
Definition pathnodes.h:1063
RelOptInfo::rtekind
RTEKind rtekind
Definition pathnodes.h:1061
RestrictInfo::security_level
Index security_level
Definition pathnodes.h:2908
RestrictInfo::clause
Expr * clause
Definition pathnodes.h:2886
Result::resconstantqual
Node * resconstantqual
Definition plannodes.h:305
Result::result_type
ResultType result_type
Definition plannodes.h:304
Result::relids
Bitmapset * relids
Definition plannodes.h:306
Result::plan
Plan plan
Definition plannodes.h:303
SampleScan::tablesample
struct TableSampleClause * tablesample
Definition plannodes.h:562
Scan::scanrelid
Index scanrelid
Definition plannodes.h:542
SeqScan::scan
Scan scan
Definition plannodes.h:551
SetOp::strategy
SetOpStrategy strategy
Definition plannodes.h:1452
SetOp::cmd
SetOpCmd cmd
Definition plannodes.h:1449
SetOp::numCols
int numCols
Definition plannodes.h:1455
SetOp::plan
Plan plan
Definition plannodes.h:1446
SetOp::numGroups
Cardinality numGroups
Definition plannodes.h:1468
Sort::numCols
int numCols
Definition plannodes.h:1146
Sort::plan
Plan plan
Definition plannodes.h:1143
SubqueryScan::scanstatus
SubqueryScanStatus scanstatus
Definition plannodes.h:775
SubqueryScan::subplan
Plan * subplan
Definition plannodes.h:774
TableFuncScan::tablefunc
TableFunc * tablefunc
Definition plannodes.h:810
TidRangeScan::tidrangequals
List * tidrangequals
Definition plannodes.h:741
TidScan::scan
Scan scan
Definition plannodes.h:725
TidScan::tidquals
List * tidquals
Definition plannodes.h:727
Unique::plan
Plan plan
Definition plannodes.h:1328
Unique::numCols
int numCols
Definition plannodes.h:1331
ValuesScan::values_lists
List * values_lists
Definition plannodes.h:799
Var::varattno
AttrNumber varattno
Definition primnodes.h:275
Var::varno
int varno
Definition primnodes.h:270
Var::varlevelsup
Index varlevelsup
Definition primnodes.h:295
WindowAgg::winname
char * winname
Definition plannodes.h:1254
WindowAgg::partNumCols
int partNumCols
Definition plannodes.h:1260
WindowAgg::endInRangeFunc
Oid endInRangeFunc
Definition plannodes.h:1304
WindowAgg::endOffset
Node * endOffset
Definition plannodes.h:1290
WindowAgg::topWindow
bool topWindow
Definition plannodes.h:1319
WindowAgg::runConditionOrig
List * runConditionOrig
Definition plannodes.h:1296
WindowAgg::inRangeColl
Oid inRangeColl
Definition plannodes.h:1307
WindowAgg::startOffset
Node * startOffset
Definition plannodes.h:1287
WindowAgg::runCondition
List * runCondition
Definition plannodes.h:1293
WindowAgg::startInRangeFunc
Oid startInRangeFunc
Definition plannodes.h:1301
WindowAgg::inRangeAsc
bool inRangeAsc
Definition plannodes.h:1310
WindowAgg::winref
Index winref
Definition plannodes.h:1257
WindowAgg::inRangeNullsFirst
bool inRangeNullsFirst
Definition plannodes.h:1313
WindowAgg::ordNumCols
int ordNumCols
Definition plannodes.h:1272
WindowAgg::frameOptions
int frameOptions
Definition plannodes.h:1284
WindowClause::startOffset
Node * startOffset
Definition parsenodes.h:1606
WindowClause::partitionClause
List * partitionClause
Definition parsenodes.h:1602
WindowClause::endOffset
Node * endOffset
Definition parsenodes.h:1607
WindowClause::orderClause
List * orderClause
Definition parsenodes.h:1604
index
Definition type.h:96
SS_attach_initplans
void SS_attach_initplans(PlannerInfo *root, Plan *plan)
Definition subselect.c:2395
SS_compute_initplan_cost
void SS_compute_initplan_cost(List *init_plans, Cost *initplan_cost_p, bool *unsafe_initplans_p)
Definition subselect.c:2354
SS_make_initplan_from_plan
void SS_make_initplan_from_plan(PlannerInfo *root, PlannerInfo *subroot, Plan *plan, Param *prm)
Definition subselect.c:3171
FirstLowInvalidHeapAttributeNumber
#define FirstLowInvalidHeapAttributeNumber
Definition sysattr.h:27
RESTRICT_RELKIND_FOREIGN_TABLE
#define RESTRICT_RELKIND_FOREIGN_TABLE
Definition tcopprot.h:45
items
static ItemArray items
Definition test_tidstore.c:48
extract_grouping_ops
Oid * extract_grouping_ops(List *groupClause)
Definition tlist.c:472
tlist_member
TargetEntry * tlist_member(Expr *node, List *targetlist)
Definition tlist.c:88
tlist_same_exprs
bool tlist_same_exprs(List *tlist1, List *tlist2)
Definition tlist.c:227
apply_tlist_labeling
void apply_tlist_labeling(List *dest_tlist, List *src_tlist)
Definition tlist.c:327
apply_pathtarget_labeling_to_tlist
void apply_pathtarget_labeling_to_tlist(List *tlist, PathTarget *target)
Definition tlist.c:783
extract_grouping_cols
AttrNumber * extract_grouping_cols(List *groupClause, List *tlist)
Definition tlist.c:523
get_sortgroupclause_tle
TargetEntry * get_sortgroupclause_tle(SortGroupClause *sgClause, List *targetList)
Definition tlist.c:376
get_sortgroupref_tle
TargetEntry * get_sortgroupref_tle(Index sortref, List *targetList)
Definition tlist.c:354
extract_grouping_collations
Oid * extract_grouping_collations(List *groupClause, List *tlist)
Definition tlist.c:498
FirstNormalObjectId
#define FirstNormalObjectId
Definition transam.h:197
pull_varattnos
void pull_varattnos(Node *node, Index varno, Bitmapset **varattnos)
Definition var.c:296
contain_vars_returning_old_or_new
bool contain_vars_returning_old_or_new(Node *node)
Definition var.c:511